libssh2 through 1.11.1, fixed in commit a2ed82d, contains a pre-authentication integer underflow vulnerability in the ssh2_cipher_crypt() function in src/openssl.c that allows a malicious SSH server to crash any connecting client by negotiating AES-GCM ciphers during handshake. Attackers can exploit the underflow in the expression computing blocksize minus aadlen minus authentication tag length to trigger an out-of-bounds read and a memcpy call with a near-SIZE_MAX length argument, causing immediate process crash before any authentication occurs.

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

  - libssh2 through 1.11.1, fixed in commit 7acf3df contains an out-of-bounds write vulnerability in
    ssh2_transport_read() that fails to enforce upper bounds on packet_length field. Remote attackers can send
    crafted SSH packets with excessively large packet_length values to corrupt heap memory and achieve remote
    code execution. (CVE-2026-55200)

  - libssh2 through 1.11.1, fixed in commit 2dae302, contains an out-of-bounds heap read vulnerability in the
    sftp_symlink() function in src/sftp.c that allows a malicious SSH server or man-in-the-middle attacker to
    disclose heap memory contents or cause a crash by sending a crafted SSH_FXP_NAME response. Attackers can
    supply a link_len value larger than the actual packet data in SSH_FXP_NAME responses for SFTP READLINK and
    REALPATH operations, triggering a heap buffer over-read of up to target_len minus one bytes due to the
    missing validation of available packet buffer size before the memcpy operation. (CVE-2025-15661)

  - libssh2 through 1.11.1, fixed in commit 1762685, contains a pre-authentication denial of service
    vulnerability in the SSH_MSG_EXT_INFO handler in src/packet.c that allows a malicious SSH server to cause
    a client CPU exhaustion loop by sending a crafted extension count value. A malicious server can set
    nr_extensions to 0xFFFFFFFF during key exchange, causing the client to spin in a tight CPU loop for over
    60 seconds because return values from _libssh2_get_string() are unchecked and the session timeout does not
    apply to CPU-bound loops. (CVE-2026-55199)

  - libssh2 through 1.11.1 reads an attacker-controlled 32-bit attribute count from a publickey-subsystem
    response and uses it in the allocation num_attrs * sizeof(libssh2_publickey_attribute) without bounds
    checking, so on 32-bit platforms the multiplication overflows to an undersized buffer. A malicious SSH
    server can then drive the attribute-parsing loop to write past the allocation, causing a heap buffer
    overflow in a connecting libssh2 client. (CVE-2026-58050)

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

  - libssh2 through 1.11.1, fixed in commit 2dae302, contains an out-of-bounds heap read vulnerability in the
    sftp_symlink() function in src/sftp.c that allows a malicious SSH server or man-in-the-middle attacker to
    disclose heap memory contents or cause a crash by sending a crafted SSH_FXP_NAME response. Attackers can
    supply a link_len value larger than the actual packet data in SSH_FXP_NAME responses for SFTP READLINK and
    REALPATH operations, triggering a heap buffer over-read of up to target_len minus one bytes due to the
    missing validation of available packet buffer size before the memcpy operation. (CVE-2025-15661)

  - libssh2 through 1.11.1 reads an attacker-controlled 32-bit attribute count from a publickey-subsystem
    response and uses it in the allocation num_attrs * sizeof(libssh2_publickey_attribute) without bounds
    checking, so on 32-bit platforms the multiplication overflows to an undersized buffer. A malicious SSH
    server can then drive the attribute-parsing loop to write past the allocation, causing a heap buffer
    overflow in a connecting libssh2 client. (CVE-2026-58050)

  - libssh2 through 1.11.1 grows its publickey list with SSH2_REALLOC but does not zero-initialize new entries
    before parsing populates them, so a parse failure reaching the cleanup path leaves
    libssh2_publickey_list_free operating on an uninitialized entry. A malicious SSH server offering the
    publickey subsystem can use a malformed response to make cleanup free an uninitialized, attacker-
    influenceable attrs pointer in a connecting libssh2 client. (CVE-2026-58051)

  - libssh2 through 1.11.1, fixed in commit 5e47761, contains a double-free vulnerability in the sftp_open()
    function in src/sftp.c that allows a malicious SSH server to corrupt the heap of any authenticated client
    opening an SFTP session. When a server responds to SSH_FXP_OPEN with SSH_FXP_STATUS containing FX_OK, the
    response data buffer is freed, and if a subsequent sftp_packet_require() call returns a specific error
    such as LIBSSH2_ERROR_CHANNEL_PACKET_EXCEEDED, the same pointer is freed a second time, enabling tcache
    dup conditions on glibc systems that allow overlapping allocations and function pointer overwrites.
    (CVE-2026-66032)

According to the versions of the libssh2 packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

    libssh2 through 1.11.1 reads an attacker-controlled 32-bit attribute count from a publickey-subsystem     response and uses it in the allocation num_attrs * sizeof(libssh2_publickey_attribute) without bounds     checking, so on 32-bit platforms the multiplication overflows to an undersized buffer. A malicious SSH     server can then drive the attribute-parsing loop to write past the allocation, causing a heap buffer     overflow in a connecting libssh2 client.(CVE-2026-58050)

    libssh2 through 1.11.1, fixed in commit a13bb6c, contains a missing bounds check vulnerability that allows     a malicious SSH server to trigger an arbitrary-length heap out-of-bounds read and a free of an     uninitialized pointer via the publickey subsystem. In libssh2_publickey_list_fetch(), the version 1     response parser reads a server-controlled comment_len value and advances the parse pointer without     verifying sufficient bytes remain in the buffer, causing the out-of-bounds read to leak heap pointers from     adjacent allocations defeating ASLR, followed by heap allocator state corruption when the error cleanup     path frees an uninitialized pointer from a non-zeroed realloc() region.(CVE-2026-66034)

    libssh2 through 1.11.1 grows its publickey list with SSH2_REALLOC but does not zero-initialize new entries     before parsing populates them, so a parse failure reaching the cleanup path leaves     libssh2_publickey_list_free operating on an uninitialized entry. A malicious SSH server offering the     publickey subsystem can use a malformed response to make cleanup free an uninitialized, attacker-     influenceable attrs pointer in a connecting libssh2 client.(CVE-2026-58051)

    libssh2 through 1.11.1, fixed in commit 5e47761, contains a double-free vulnerability in the sftp_open()     function in src/sftp.c that allows a malicious SSH server to corrupt the heap of any authenticated client     opening an SFTP session. When a server responds to SSH_FXP_OPEN with SSH_FXP_STATUS containing FX_OK, the     response data buffer is freed, and if a subsequent sftp_packet_require() call returns a specific error     such as LIBSSH2_ERROR_CHANNEL_PACKET_EXCEEDED, the same pointer is freed a second time, enabling tcache     dup conditions on glibc systems that allow overlapping allocations and function pointer     overwrites.(CVE-2026-66032)

    libssh2 through 1.11.1, fixed in commit 2dae302, contains an out-of-bounds heap read vulnerability in the     sftp_symlink() function in src/sftp.c that allows a malicious SSH server or man-in-the-middle attacker to     disclose heap memory contents or cause a crash by sending a crafted SSH_FXP_NAME response. Attackers can     supply a link_len value larger than the actual packet data in SSH_FXP_NAME responses for SFTP READLINK and     REALPATH operations, triggering a heap buffer over-read of up to target_len minus one bytes due to the     missing validation of available packet buffer size before the memcpy operation.(CVE-2025-15661)

    libssh2 through 1.11.1, fixed in commit a2ed82d, contains a pre-authentication integer underflow     vulnerability in the ssh2_cipher_crypt() function in src/openssl.c that allows a malicious SSH server to     crash any connecting client by negotiating AES-GCM ciphers during handshake. Attackers can exploit the     underflow in the expression computing blocksize minus aadlen minus authentication tag length to trigger an     out-of-bounds read and a memcpy call with a near-SIZE_MAX length argument, causing immediate process crash     before any authentication occurs.(CVE-2026-66033)

    libssh2 through 1.11.1, fixed in commit 1762685, contains a pre-authentication denial of service     vulnerability in the SSH_MSG_EXT_INFO handler in src/packet.c that allows a malicious SSH server to cause     a client CPU exhaustion loop by sending a crafted extension count value. A malicious server can set     nr_extensions to 0xFFFFFFFF during key exchange, causing the client to spin in a tight CPU loop for over     60 seconds because return values from _libssh2_get_string() are unchecked and the session timeout does not     apply to CPU-bound loops.(CVE-2026-55199)

    libssh2 through 1.11.1, fixed in commit 42e33d8, contains a pre-authentication heap buffer overflow     vulnerability that allows a malicious SSH server to corrupt heap metadata in any connecting client by     sending a packet with a packet_length smaller than the cipher's block size during Encrypt-then-MAC cipher     negotiation. In the fullpacket() function in src/transport.c, the ETM path allocates a buffer of     packet_length bytes but copies blocksize minus one bytes via memcpy, causing an overflow that on 32-bit     glibc writes attacker-controlled bytes into an adjacent chunk's SIZE field, enabling tcache bin confusion,     overlapping live objects, and function pointer overwrite during the session handshake before     authentication.(CVE-2026-66035)

Tenable has extracted the preceding description block directly from the EulerOS libssh2 security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - libssh2 through 1.11.1, fixed in commit a2ed82d, contains a pre-authentication integer underflow
    vulnerability in the ssh2_cipher_crypt() function in src/openssl.c that allows a malicious SSH server to
    crash any connecting client by negotiating AES-GCM ciphers during handshake. Attackers can exploit the
    underflow in the expression computing blocksize minus aadlen minus authentication tag length to trigger an
    out-of-bounds read and a memcpy call with a near-SIZE_MAX length argument, causing immediate process crash
    before any authentication occurs. (CVE-2026-66033)

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:4095-1 advisory.

    - CVE-2025-15661: out-of-bounds heap read vulnerability in the sftp_symlink() function in src/sftp.c     (bsc#1268546).
    - CVE-2026-7598: integer overflow in function `userauth_password` of file `src/userauth.c` (bsc#1263890).
    - CVE-2026-58050: attacker controlled attribute count from a publickey-subsystem response is used without     bounds       checking and can cause to a heap buffer overflow in a connecting libssh2 client (bsc#1269568).
    - CVE-2026-58051: public key list is increased and does not zero-initialized new entries, which can cause     an       uninitialized pointer to be freed when a malformed response is sent by an SSH server (bsc#1269567).
    - CVE-2026-66032: Arbitrary code execution via double-free in SFTP session (bsc#1272737).
    - CVE-2026-66033: Denial of Service via integer underflow in AES-GCM cipher negotiation (bsc#1272736).
    - CVE-2026-66034: Information disclosure and potential arbitrary code execution via heap out-of-bounds     read       (bsc#1272735).
    - CVE-2026-66035: Arbitrary code execution via heap buffer overflow during SSH negotiation (bsc#1272734).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 24.04 LTS / 26.04 LTS / Pro Realtime 24.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-8722-1 advisory.

    It was discovered that libssh2 incorrectly handled certain SFTP server responses. A remote attacker     controlling an SSH server could use this issue to cause libssh2 to crash or possibly execute arbitrary     code. (CVE-2026-66032)

    It was discovered that libssh2 incorrectly handled AES-GCM cipher negotiation. A remote attacker     controlling an SSH server could possibly use this issue to cause libssh2 to crash, resulting in a denial     of service. (CVE-2026-66033)

    It was discovered that libssh2 incorrectly handled Encrypt-then-MAC cipher negotiation. A remote attacker     controlling an SSH server could use this issue to cause libssh2 to crash or possibly execute arbitrary     code. (CVE-2026-66035)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-2064 advisory.

    libgit2 Submodule path traversal (CVE-2026-53584)

    Unbounded Memory Allocation via Delta Object Result-Size Header (CVE-2026-53585)

    libgit2 version 1.9.4 and below is vulnerable to a heap out-of-bounds read in set_data() in     src/libgit2/transports/smart_pkt.c.

    The vulnerable code uses a fixed-size strncmp (smart_pkt.c:239) against the unvalidated capability buffer     of a smart-protocol pkt-line. When the bytes following the pkt-line in the contiguous receive buffer     happen to continue with ct-format=, the comparison spuriously matches, advancing format_str past the     pkt-line boundary. The following memchr(format_str, ' ', len - (format_str - line)) (smart_pkt.c:246) then     underflows its size_t size argument to ~SIZE_MAX and walks the heap looking for a space byte. An     unauthenticated remote attacker who controls (or man-in-the-middles) a Git server reached over     HTTP/HTTPS/SSH/git:// can trigger this on the FIRST ref-pkt of the refs advertisement, before any     capability negotiation has taken place. The OOB walk causes a process crash (SIGSEGV) when memchr enters     an unmapped page, and -- on heap layouts where memchr finds a stray space byte before crashing -- can     additionally drive the git_error_set(...'%.*s', format_len, format_str) formatter to copy a large window     of heap memory into the error string. (CVE-2026-53587)

    libssh2 through 1.11.1, fixed in commit 5e47761, contains a double-free vulnerability in the sftp_open()     function in src/sftp.c that allows a malicious SSH server to corrupt the heap of any authenticated client     opening an SFTP session. When a server responds to SSH_FXP_OPEN with SSH_FXP_STATUS containing FX_OK, the     response data buffer is freed, and if a subsequent sftp_packet_require() call returns a specific error     such as LIBSSH2_ERROR_CHANNEL_PACKET_EXCEEDED, the same pointer is freed a second time, enabling tcache     dup conditions on glibc systems that allow overlapping allocations and function pointer overwrites.
    (CVE-2026-66032)

    libssh2 through 1.11.1, fixed in commit a2ed82d, contains a pre-authentication integer underflow     vulnerability in the ssh2_cipher_crypt() function in src/openssl.c that allows a malicious SSH server to     crash any connecting client by negotiating AES-GCM ciphers during handshake. Attackers can exploit the     underflow in the expression computing blocksize minus aadlen minus authentication tag length to trigger an     out-of-bounds read and a memcpy call with a near-SIZE_MAX length argument, causing immediate process crash     before any authentication occurs. (CVE-2026-66033)

    libssh2 through 1.11.1, fixed in commit a13bb6c, contains a missing bounds check vulnerability that allows     a malicious SSH server to trigger an arbitrary-length heap out-of-bounds read and a free of an     uninitialized pointer via the publickey subsystem. In libssh2_publickey_list_fetch(), the version 1     response parser reads a server-controlled comment_len value and advances the parse pointer without     verifying sufficient bytes remain in the buffer, causing the out-of-bounds read to leak heap pointers from     adjacent allocations defeating ASLR, followed by heap allocator state corruption when the error cleanup     path frees an uninitialized pointer from a non-zeroed realloc() region. (CVE-2026-66034)

    libssh2 through 1.11.1, fixed in commit 42e33d8, contains a pre-authentication heap buffer overflow     vulnerability that allows a malicious SSH server to corrupt heap metadata in any connecting client by     sending a packet with a packet_length smaller than the cipher's block size during Encrypt-then-MAC cipher     negotiation. In the fullpacket() function in src/transport.c, the ETM path allocates a buffer of     packet_length bytes but copies blocksize minus one bytes via memcpy, causing an overflow that on 32-bit     glibc writes attacker-controlled bytes into an adjacent chunk's SIZE field, enabling tcache bin confusion,     overlapping live objects, and function pointer overwrite during the session handshake before     authentication. (CVE-2026-66035)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21549-1 advisory.

    - CVE-2025-15661: out-of-bounds heap read vulnerability in the `sftp_symlink()` function in `src/sftp.c`     (bsc#1268546).
    - CVE-2026-7598: integer overflow in function `userauth_password` of file `src/userauth.c` (bsc#1263890).
    - CVE-2026-58050: heap buffer overflow due to missing bounds check in attribute count of publickey-     subsystem response       (bsc#1269568).
    - CVE-2026-58051: uninitialized pointer freed when malformed responses are sent by an SSH server     (bsc#1269567).
    - CVE-2026-66032: arbitrary code execution via double-free in SFTP session (bsc#1272737).
    - CVE-2026-66033: denial of service via integer underflow in AES-GCM cipher negotiation (bsc#1272736).
    - CVE-2026-66034: information disclosure and potential arbitrary code execution via heap out-of-bounds     read       (bsc#1272735).
    - CVE-2026-66035: arbitrary code execution via heap buffer overflow during SSH negotiation (bsc#1272734).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3541-1 advisory.

    - CVE-2025-15661: out-of-bounds heap read vulnerability in the `sftp_symlink()` function in `src/sftp.c`     (bsc#1268546).
    - CVE-2026-7598: integer overflow in function `userauth_password` of file `src/userauth.c` (bsc#1263890).
    - CVE-2026-58050: heap buffer overflow due to missing bounds check in attribute count of publickey-     subsystem response       (bsc#1269568).
    - CVE-2026-58051: uninitialized pointer freed when malformed responses are sent by an SSH server     (bsc#1269567).
    - CVE-2026-66032: arbitrary code execution via double-free in SFTP session (bsc#1272737).
    - CVE-2026-66033: denial of service via integer underflow in AES-GCM cipher negotiation (bsc#1272736).
    - CVE-2026-66034: information disclosure and potential arbitrary code execution via heap out-of-bounds     read       (bsc#1272735).
    - CVE-2026-66035: arbitrary code execution via heap buffer overflow during SSH negotiation (bsc#1272734).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3526-1 advisory.

    - CVE-2025-15661: out-of-bounds heap read vulnerability in the `sftp_symlink()` function in `src/sftp.c`     (bsc#1268546).
    - CVE-2026-7598: integer overflow in function `userauth_password` of file `src/userauth.c` (bsc#1263890).
    - CVE-2026-58050: heap buffer overflow due to missing bounds check in attribute count of publickey-     subsystem response       (bsc#1269568).
    - CVE-2026-58051: uninitialized pointer freed when malformed responses are sent by an SSH server     (bsc#1269567).
    - CVE-2026-66032: arbitrary code execution via double-free in SFTP session (bsc#1272737).
    - CVE-2026-66033: denial of service via integer underflow in AES-GCM cipher negotiation (bsc#1272736).
    - CVE-2026-66034: information disclosure and potential arbitrary code execution via heap out-of-bounds     read       (bsc#1272735).
    - CVE-2026-66035: arbitrary code execution via heap buffer overflow during SSH negotiation (bsc#1272734).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3525-1 advisory.

    - CVE-2025-15661: out-of-bounds heap read vulnerability in the `sftp_symlink()` function in `src/sftp.c`     (bsc#1268546).
    - CVE-2026-7598: integer overflow in function `userauth_password` of file `src/userauth.c` (bsc#1263890).
    - CVE-2026-55199: pre-authentication DoS via the `SSH_MSG_EXT_INFO` handler (bsc#1268530).
    - CVE-2026-58050: heap buffer overflow due to missing bounds check in attribute count of publickey-     subsystem response       (bsc#1269568).
    - CVE-2026-58051: uninitialized pointer freed when malformed responses are sent by an SSH server     (bsc#1269567).
    - CVE-2026-66032: arbitrary code execution via double-free in SFTP session (bsc#1272737).
    - CVE-2026-66033: denial of service via integer underflow in AES-GCM cipher negotiation (bsc#1272736).
    - CVE-2026-66034: information disclosure and potential arbitrary code execution via heap out-of-bounds     read       (bsc#1272735).
    - CVE-2026-66035: arbitrary code execution via heap buffer overflow during SSH negotiation (bsc#1272734).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2026:0785 advisory.

    Package updates are available for TencentOS Server 4 that fix the following vulnerabilities:

    CVE-2026-66035:
    libssh2 through 1.11.1, fixed in commit 42e33d8, contains a pre-authentication heap buffer overflow     vulnerability that allows a malicious SSH server to corrupt heap metadata in any connecting client by     sending a packet with a packet_length smaller than the cipher's block size during Encrypt-then-MAC cipher     negotiation. In the fullpacket() function in src/transport.c, the ETM path allocates a buffer of     packet_length bytes but copies blocksize minus one bytes via memcpy, causing an overflow that on 32-bit     glibc writes attacker-controlled bytes into an adjacent chunk's SIZE field, enabling tcache bin confusion,     overlapping live objects, and function pointer overwrite during the session handshake before     authentication.

    CVE-2026-66034:
    libssh2 through 1.11.1, fixed in commit a13bb6c, contains a missing bounds check vulnerability that allows     a malicious SSH server to trigger an arbitrary-length heap out-of-bounds read and a free of an     uninitialized pointer via the publickey subsystem. In libssh2_publickey_list_fetch(), the version 1     response parser reads a server-controlled comment_len value and advances the parse pointer without     verifying sufficient bytes remain in the buffer, causing the out-of-bounds read to leak heap pointers from     adjacent allocations defeating ASLR, followed by heap allocator state corruption when the error cleanup     path frees an uninitialized pointer from a non-zeroed realloc() region.

    CVE-2026-66033:
    libssh2 through 1.11.1, fixed in commit a2ed82d, contains a pre-authentication integer underflow     vulnerability in the ssh2_cipher_crypt() function in src/openssl.c that allows a malicious SSH server to     crash any connecting client by negotiating AES-GCM ciphers during handshake.

    CVE-2026-66032:
    libssh2 through 1.11.1 contains a double-free vulnerability in the sftp_open() function in src/sftp.c that     allows a malicious SSH server to corrupt the heap of any authenticated client opening an SFTP session.
    When a server responds to SSH_FXP_OPEN with SSH_FXP_STATUS containing FX_OK, the response data buffer is     freed, and if a subsequent sftp_packet_require() call returns a specific error such as     LIBSSH2_ERROR_CHANNEL_PACKET_EXCEEDED, the same pointer is freed a second time, enabling tcache dup     conditions on glibc systems.

Tenable has extracted the preceding description block directly from the Tencent Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
476436	Alpine: multiple libssh2 packages: security update to 1.11.1-r3	Tenable Cloud Security	Alpine Linux Local Security Checks	Local	critical
476436	Alpine: multiple libssh2 packages: security update to 1.11.1-r3	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	Local	critical
476347	Alpine: multiple libssh2 packages: security update to 1.11.1-r4	Tenable Cloud Security	Alpine Linux Local Security Checks	Local	high
476347	Alpine: multiple libssh2 packages: security update to 1.11.1-r4	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	Local	high
364083	EulerOS 2.0 SP15 : libssh2 (EulerOS-SA-2026-3921)	Nessus	Huawei Local Security Checks	Local	high
364042	EulerOS 2.0 SP15 : libssh2 (EulerOS-SA-2026-3987)	Nessus	Huawei Local Security Checks	Local	high
461752	Echo: libssh2: security update to 1.11.1-1+e5	Tenable Cloud Security	Echo Local Security Checks	Local	high
461752	Echo: libssh2: security update to 1.11.1-1+e5	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	high
345593	SUSE SLES15 Security Update : libssh2_org (SUSE-SU-2026:4095-1)	Nessus	SuSE Local Security Checks	Local	high
344609	Ubuntu 24.04 LTS / 26.04 LTS / Pro Realtime 24.04 LTS : libssh2 vulnerabilities (USN-8722-1)	Nessus	Ubuntu Local Security Checks	Local	high
337216	Amazon Linux 2023 : cargo-c (ALAS2023-2026-2064)	Nessus	Amazon Linux Local Security Checks	Local	high
335046	openSUSE 16 Security Update : libssh2_org (openSUSE-SU-2026:21549-1)	Nessus	SuSE Local Security Checks	Local	high
334785	SUSE SLED15 / SLES15 Security Update : libssh2_org (SUSE-SU-2026:3541-1)	Nessus	SuSE Local Security Checks	Local	high
333544	SUSE SLES15 Security Update : libssh2_org (SUSE-SU-2026:3526-1)	Nessus	SuSE Local Security Checks	Local	high
333542	SUSE SLES12 Security Update : libssh2_org (SUSE-SU-2026:3525-1)	Nessus	SuSE Local Security Checks	Local	high
333143	TencentOS Server 4: libssh2 (TSSA-2026:0785)	Nessus	Tencent Local Security Checks	Local	high

Detections

Analytics

CVE-2026-66033

high

Tenable Plugins

critical

critical

high

high

high

high

high

high

high

high

high

high

high

high

high

high