A weakness has been identified in libssh up to 0.11.3. The impacted element is the function sftp_extensions_get_name/sftp_extensions_get_data of the file src/sftp.c of the component SFTP Extension Name Handler. Executing a manipulation of the argument idx can lead to out-of-bounds read. The attack may be performed from remote. Upgrading to version 0.11.4 and 0.12.0 is sufficient to resolve this issue. This patch is called 855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60. You should upgrade the affected component.

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

    A weakness has been identified in libssh up to 0.11.3. The impacted element is the function     sftp_extensions_get_name/sftp_extensions_get_data of the file src/sftp.c of the component SFTP Extension     Name Handler. Executing a manipulation of the argument idx can lead to out-of-bounds read. The attack may     be performed from remote. Upgrading to version 0.11.4 and 0.12.0 is sufficient to resolve this issue. This     patch is called 855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60. You should upgrade the affected     component.(CVE-2026-3731)

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

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

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

    A weakness has been identified in libssh up to 0.11.3. The impacted element is the function     sftp_extensions_get_name/sftp_extensions_get_data of the file src/sftp.c of the component SFTP Extension     Name Handler. Executing a manipulation of the argument idx can lead to out-of-bounds read. The attack may     be performed from remote. Upgrading to version 0.11.4 and 0.12.0 is sufficient to resolve this issue. This     patch is called 855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60. You should upgrade the affected     component.(CVE-2026-3731)

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

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

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

    The API function `ssh_get_hexa()` is vulnerable, when 0-lenght     input is provided to this function. This function is used internally     in `ssh_get_fingerprint_hash()` and `ssh_print_hexa()` (deprecated),     which is vulnerable to the same input (length is provided by the     calling application).

    The function is also used internally in the gssapi code for logging     the OIDs received by the server during GSSAPI authentication. This     could be triggered remotely, when the server allows GSSAPI authentication     and logging verbosity is set at least to SSH_LOG_PACKET (3). This     could cause self-DoS of the per-connection daemon process.(CVE-2026-0966)

    A flaw was found in libssh in which a malicious SFTP (SSH File Transfer Protocol) server can exploit this     by sending a malformed 'longname' field within an `SSH_FXP_NAME` message during a file listing operation.
    This missing null check can lead to reading beyond allocated memory on the heap. This can cause unexpected     behavior or lead to a denial of service (DoS) due to application crashes.(CVE-2026-0968)

    A flaw was found in libssh where it can attempt to open arbitrary files during configuration parsing. A     local attacker can exploit this by providing a malicious configuration file or when the system is     misconfigured. This vulnerability could lead to a Denial of Service (DoS) by causing the system to try and     access dangerous files, such as block devices or large system files, which can disrupt normal     operations.(CVE-2026-0965)

    A malicious SCP server can send unexpected paths that could make the     client application override local files outside of working directory.
    This could be misused to create malicious executable or configuration     files and make the user execute them under specific consequences.

    This is the same issue as in OpenSSH, tracked as CVE-2019-6111.(CVE-2026-0964)

    A flaw was found in libssh. A remote attacker, by controlling client configuration files or known_hosts     files, could craft specific hostnames that when processed by the `match_pattern()` function can lead to     inefficient regular expression backtracking. This can cause timeouts and resource exhaustion, resulting in     a Denial of Service (DoS) for the client.(CVE-2026-0967)

    A weakness has been identified in libssh up to 0.11.3. The impacted element is the function     sftp_extensions_get_name/sftp_extensions_get_data of the file src/sftp.c of the component SFTP Extension     Name Handler. Executing a manipulation of the argument idx can lead to out-of-bounds read. The attack may     be performed from remote. Upgrading to version 0.11.4 and 0.12.0 is sufficient to resolve this issue. This     patch is called 855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60. You should upgrade the affected     component.(CVE-2026-3731)

Tenable has extracted the preceding description block directly from the EulerOS libssh 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 a vulnerability as referenced in the ALAS2023-2026-1759 advisory.

    A weakness has been identified in libssh up to 0.11.3. The impacted element is the function     sftp_extensions_get_name/sftp_extensions_get_data of the file src/sftp.c of the component SFTP Extension     Name Handler. Executing a manipulation of the argument idx can lead to out-of-bounds read. The attack may     be performed from remote. Upgrading to version 0.11.4 and 0.12.0 is sufficient to resolve this issue. This     patch is called 855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60. You should upgrade the affected component.
    (CVE-2026-3731)

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

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

According to the versions of the libssh package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

    A malicious SCP server can send unexpected paths that could make the client application override local     files outside of working directory.This could be misused to create malicious executable or configuration     files and make the user execute them under specific consequences.This is the same issue as in OpenSSH,     tracked as CVE-2019-6111.(CVE-2026-0964)

    A flaw was found in libssh where it can attempt to open arbitrary files during configuration parsing. A     local attacker can exploit this by providing a malicious configuration file or when the system is     misconfigured. This vulnerability could lead to a Denial of Service (DoS) by causing the system to try and     access dangerous files, such as block devices or large system files, which can disrupt normal     operations.(CVE-2026-0965)

    The API function `ssh_get_hexa()` is vulnerable, when 0-lenght input is provided to this function. This     function is used internally in `ssh_get_fingerprint_hash()` and `ssh_print_hexa()` (deprecated),which is     vulnerable to the same input (length is provided by the     calling application).The function is also used internally in the gssapi code for logging the OIDs received     by the server during GSSAPI authentication. This could be triggered remotely, when the server allows     GSSAPI authentication and logging verbosity is set at least to SSH_LOG_PACKET (3). This could cause self-     DoS of the per-connection daemon process.(CVE-2026-0966)

    A flaw was found in libssh. A remote attacker, by controlling client configuration files or known_hosts     files, could craft specific hostnames that when processed by the `match_pattern()` function can lead to     inefficient regular expression backtracking. This can cause timeouts and resource exhaustion, resulting in     a Denial of Service (DoS) for the client.(CVE-2026-0967)

    A flaw was found in libssh in which a malicious SFTP (SSH File Transfer Protocol) server can exploit this     by sending a malformed 'longname' field within an `SSH_FXP_NAME` message during a file listing operation.
    This missing null check can lead to reading beyond allocated memory on the heap. This can cause unexpected     behavior or lead to a denial of service (DoS) due to application crashes.(CVE-2026-0968)

    A weakness has been identified in libssh up to 0.11.3. The impacted element is the function     sftp_extensions_get_name/sftp_extensions_get_data of the file src/sftp.c of the component SFTP Extension     Name Handler. Executing a manipulation of the argument idx can lead to out-of-bounds read. The attack may     be performed from remote. Upgrading to version 0.11.4 and 0.12.0 is sufficient to resolve this issue. This     patch is called 855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60. You should upgrade the affected     component.(CVE-2026-3731)

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

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

According to the versions of the libssh package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

    A weakness has been identified in libssh up to 0.11.3. The impacted element is the function     sftp_extensions_get_name/sftp_extensions_get_data of the file src/sftp.c of the component SFTP Extension     Name Handler. Executing a manipulation of the argument idx can lead to out-of-bounds read. The attack may     be performed from remote. Upgrading to version 0.11.4 and 0.12.0 is sufficient to resolve this issue. This     patch is called 855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60. You should upgrade the affected     component.(CVE-2026-3731)

    A flaw was found in libssh where it can attempt to open arbitrary files during configuration parsing. A     local attacker can exploit this by providing a malicious configuration file or when the system is     misconfigured. This vulnerability could lead to a Denial of Service (DoS) by causing the system to try and     access dangerous files, such as block devices or large system files, which can disrupt normal     operations.(CVE-2026-0965)

    A malicious SCP server can send unexpected paths that could make the client application override local     files outside of working directory.This could be misused to create malicious executable or configuration     files and make the user execute them under specific consequences.This is the same issue as in OpenSSH,     tracked as CVE-2019-6111.(CVE-2026-0964)

    A flaw was found in libssh. A remote attacker, by controlling client configuration files or known_hosts     files, could craft specific hostnames that when processed by the `match_pattern()` function can lead to     inefficient regular expression backtracking. This can cause timeouts and resource exhaustion, resulting in     a Denial of Service (DoS) for the client.(CVE-2026-0967)

    The API function `ssh_get_hexa()` is vulnerable, when 0-lenght input is provided to this function. This     function is used internally in `ssh_get_fingerprint_hash()` and `ssh_print_hexa()` (deprecated),which is     vulnerable to the same input (length is provided by the     calling application).The function is also used internally in the gssapi code for logging the OIDs received     by the server during GSSAPI authentication. This could be triggered remotely, when the server allows     GSSAPI authentication and logging verbosity is set at least to SSH_LOG_PACKET (3). This could cause self-     DoS of the per-connection daemon process.(CVE-2026-0966)

    A flaw was found in libssh in which a malicious SFTP (SSH File Transfer Protocol) server can exploit this     by sending a malformed 'longname' field within an `SSH_FXP_NAME` message during a file listing operation.
    This missing null check can lead to reading beyond allocated memory on the heap. This can cause unexpected     behavior or lead to a denial of service (DoS) due to application crashes.(CVE-2026-0968)

Tenable has extracted the preceding description block directly from the EulerOS Virtualization libssh 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 a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1344-1 advisory.

    - CVE-2026-3731: denial of service via out-of-bounds read in SFTP extension name handler (bsc#1259377).
    - CVE-2026-0964: SCP protocol path traversal in `ssh_scp_pull_request()` (bsc#1258049).
    - CVE-2026-0965: possible denial of service when parsing unexpected configuration files (bsc#1258045).
    - CVE-2026-0966: buffer underflow in `ssh_get_hexa()` on invalid input (bsc#1258054).
    - CVE-2026-0967: specially crafted patterns could cause a denial of service (bsc#1258081).
    - CVE-2026-0968: out-of-bounds read in `sftp_parse_longname()` (bsc#1258080).

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 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2026:1310-1 advisory.

    - CVE-2026-3731: Denial of Service via out-of-bounds read in SFTP extension name handler (bsc#1259377).

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

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

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.10 host has packages installed that are affected by a vulnerability as referenced in the USN-8093-1 advisory.

    It was discovered that libssh incorrectly performed bounds checking when processing SFTP extensions. If a     client application queried extension data out of bounds, it could cause the application to crash,     resulting in a denial of service, or exhibit unintended behavior.

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

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

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - A weakness has been identified in libssh up to 0.11.3. The impacted element is the function     sftp_extensions_get_name/sftp_extensions_get_data of the file src/sftp.c of the component SFTP Extension     Name Handler. Executing a manipulation of the argument idx can lead to out-of-bounds read. The attack may     be performed from remote. Upgrading to version 0.11.4 and 0.12.0 is sufficient to resolve this issue. This     patch is called 855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60. You should upgrade the affected component.
    (CVE-2026-3731)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
320750	EulerOS Virtualization 2.13.1 : libssh (EulerOS-SA-2026-2376)	Nessus	Huawei Local Security Checks	medium
320700	EulerOS Virtualization 2.13.0 : libssh (EulerOS-SA-2026-2405)	Nessus	Huawei Local Security Checks	medium
320308	EulerOS 2.0 SP13 : libssh (EulerOS-SA-2026-2299)	Nessus	Huawei Local Security Checks	medium
320305	EulerOS 2.0 SP13 : libssh (EulerOS-SA-2026-2342)	Nessus	Huawei Local Security Checks	medium
319979	EulerOS 2.0 SP11 : libssh (EulerOS-SA-2026-2214)	Nessus	Huawei Local Security Checks	medium
319946	EulerOS 2.0 SP11 : libssh (EulerOS-SA-2026-2252)	Nessus	Huawei Local Security Checks	medium
319770	Amazon Linux 2023 : libssh, libssh-config, libssh-devel (ALAS2023-2026-1759)	Nessus	Amazon Linux Local Security Checks	medium
319459	EulerOS Virtualization 2.10.1 : libssh (EulerOS-SA-2026-2027)	Nessus	Huawei Local Security Checks	medium
319452	EulerOS Virtualization 2.12.1 : libssh (EulerOS-SA-2026-2080)	Nessus	Huawei Local Security Checks	medium
319381	EulerOS Virtualization 2.12.0 : libssh (EulerOS-SA-2026-2105)	Nessus	Huawei Local Security Checks	medium
319337	EulerOS Virtualization 2.10.0 : libssh (EulerOS-SA-2026-2054)	Nessus	Huawei Local Security Checks	medium
306680	SUSE SLES12 Security Update : libssh (SUSE-SU-2026:1344-1)	Nessus	SuSE Local Security Checks	medium
306481	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : libssh (SUSE-SU-2026:1310-1)	Nessus	SuSE Local Security Checks	medium
302895	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.10 : libssh vulnerability (USN-8093-1)	Nessus	Ubuntu Local Security Checks	medium
301503	Linux Distros Unpatched Vulnerability : CVE-2026-3731	Nessus	Misc.	medium

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