Erlang is a programming language and runtime system for building massively scalable soft real-time systems with requirements on high availability. OTP is a set of Erlang libraries, which consists of the Erlang runtime system, a number of ready-to-use components mainly written in Erlang. Packet size is not verified properly for SFTP packets. As a result when multiple SSH packets (conforming to max SSH packet size) are received by ssh, they might be combined into an SFTP packet which will exceed the max allowed packet size and potentially cause large amount of memory to be allocated. Note that situation described above can only happen for successfully authenticated users after completing the SSH handshake. This issue has been patched in OTP versions 27.2.4, 26.2.5.9, and 25.3.2.18. There are no known workarounds for this vulnerability.

The remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8901-1 advisory.

    Wander Nauta discovered that Erlang incorrectly handled absolute paths when extracting zip archives. An     attacker could possibly use this issue to write arbitrary files outside of the intended directory. This     issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2025-4748)

    It was discovered that the Erlang SFTP server did not properly limit the size of packets. A remote     attacker could possibly use this issue to cause Erlang to use excessive resources, leading to a denial of     service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 18.04 LTS.
    (CVE-2025-26618)

    It was discovered that the Erlang SSH server did not properly limit the length of algorithm names in key     exchange messages. A remote attacker could possibly use this issue to cause Erlang to use excessive     resources, leading to a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS,     and Ubuntu 18.04 LTS. (CVE-2025-30211)

    It was discovered that the Erlang TFTP server incorrectly handled certain file paths. A remote attacker     could possibly use this issue to access files outside of the intended directory. (CVE-2026-21620)

    It was discovered that the Erlang SFTP server incorrectly validated paths against the configured root     directory. An authenticated user could possibly use this issue to access files outside of the root     directory. (CVE-2026-23942)

    It was discovered that the Erlang SSH server enabled zlib compression by default and did not limit the     size of decompressed data. A remote attacker could possibly use this issue to cause Erlang to use     excessive resources, leading to a denial of service. (CVE-2026-23943)

    It was discovered that the Erlang HTTP server incorrectly applied directory access controls to CGI scripts     served via script aliases. A remote attacker could possibly use this issue to bypass authentication and     access protected CGI scripts. (CVE-2026-28808)

    It was discovered that the Erlang DNS resolver used predictable transaction IDs and did not randomize     source ports. A remote attacker could possibly use this issue to perform DNS cache poisoning attacks. This     issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-28810)

    It was discovered that Erlang did not verify the signatures of designated OCSP responder certificates. A     remote attacker could possibly use this issue to forge OCSP responses and bypass certificate revocation     checks. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-32144)

    It was discovered that the Erlang SFTP server incorrectly handled file attribute changes on open file     handles. An authenticated user could possibly use this issue to modify the attributes of files outside of     the root directory. (CVE-2026-32147)

    It was discovered that Erlang incorrectly allowed non-CA certificates to act as intermediate certificate     issuers. A remote attacker could possibly use this issue to forge certificate chains. (CVE-2026-42789)

    It was discovered that Erlang incorrectly handled DNS name constraints during hostname verification. A     remote attacker could possibly use this issue to bypass certificate validation. This issue only affected     Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS.
    (CVE-2026-42790)

    It was discovered that Erlang did not check the validity period of OCSP responder certificates. A remote     attacker could possibly use this issue to forge OCSP responses using an expired responder certificate.
    This issue only affected Ubuntu 26.04 LTS. (CVE-2026-42791)

    It was discovered that Erlang incorrectly handled relative paths when extracting zip archives. An attacker     could possibly use this issue to write arbitrary files outside of the intended directory. This issue only     affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS.
    (CVE-2026-47078)

    It was discovered that the Erlang SFTP server exposed absolute paths when reading symbolic links. An     authenticated user could possibly use this issue to obtain sensitive information. (CVE-2026-48855)

    It was discovered that the Erlang HTTP client forwarded authorization headers on cross-origin redirects. A     malicious HTTP server could possibly use this issue to obtain sensitive information. (CVE-2026-48856)

    It was discovered that the Erlang FTP client did not validate the IP address in passive mode responses. A     malicious FTP server could possibly use this issue to perform server-side request forgery attacks.
    (CVE-2026-48858)

    It was discovered that Erlang checked the local address instead of the peer address when enforcing the     allowlist for distribution over TLS. A remote attacker could possibly use this issue to bypass access     restrictions. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-48860)

    It was discovered that Erlang incorrectly handled certain SCTP ERROR chunks, leading to a buffer overflow.
    A remote attacker could possibly use this issue to cause Erlang to crash, resulting in a denial of     service. (CVE-2026-49759)

    It was discovered that the Erlang erl_interface library incorrectly handled printing very large integers,     leading to a buffer overflow. An attacker could possibly use this issue to cause Erlang to crash or     execute arbitrary code. (CVE-2026-49760)

    It was discovered that the Erlang SFTP server incorrectly handled certain path resolution requests. An     authenticated user could possibly use this issue to determine the existence of files outside of the root     directory. (CVE-2026-53422)

    It was discovered that the Erlang SFTP server incorrectly handled extended channel data, leading to an     infinite loop. An authenticated user could possibly use this issue to cause a denial of service.
    (CVE-2026-54886)

    It was discovered that the Erlang DTLS server used a predictable cookie secret on startup. A remote     attacker could possibly use this issue to bypass source address verification. This issue only affected     Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS.
    (CVE-2026-54887)

    It was discovered that Erlang TLS clients incorrectly accepted application data before the handshake was     completed. A remote attacker could possibly use this issue to inject arbitrary data into TLS connections.
    (CVE-2026-54891)

    It was discovered that the Erlang DTLS server contained a race condition when handling rapid client     reconnections. A remote attacker could possibly use this issue to cause Erlang to crash, resulting in a     denial of service. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-55950)

    It was discovered that Erlang did not properly validate TLS 1.3 pre-shared key extensions. A remote     attacker could possibly use this issue to cause Erlang to crash, resulting in a denial of service. This     issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS.
    (CVE-2026-55952)

    It was discovered that the Erlang ASN.1 decoder incorrectly handled certain object identifiers. A remote     attacker could possibly use this issue to cause Erlang to use excessive resources, leading to a denial of     service. (CVE-2026-65634)

    It was discovered that the Erlang SSH server did not properly limit the number of open channels. An     authenticated user could possibly use this issue to cause Erlang to use excessive resources, leading to a     denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu     22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-68956)

    It was discovered that the Erlang HTTP server incorrectly shared users and groups between directories when     using dets or mnesia authentication backends. A remote attacker could possibly use this issue to bypass     authentication and access protected directories. (CVE-2026-74994)

    It was discovered that Erlang TLS clients incorrectly accepted unsolicited TLS 1.3 pre-shared keys from     servers. A remote attacker could possibly use this issue to impersonate servers. This issue only affected     Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-89422)

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.

An update of the erlang package has been released.

The version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2025:0219 advisory.

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

    CVE-2025-26618:
    Erlang is a programming language and runtime system for building massively scalable soft real-time systems     with requirements on high availability. OTP is a set of Erlang libraries, which consists of the Erlang     runtime system, a number of ready-to-use components mainly written in Erlang. Packet size is not verified     properly for SFTP packets. As a result when multiple SSH packets (conforming to max SSH packet size) are     received by ssh, they might be combined into an SFTP packet which will exceed the max allowed packet size     and potentially cause large amount of memory to be allocated. Note that situation described above can only     happen for successfully authenticated users after completing the SSH handshake. This issue has been     patched in OTP versions 27.2.4, 26.2.5.9, and 25.3.2.18. There are no known workarounds for this     vulnerability.

Tenable has extracted the preceding description block directly from the Tencent Linux 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 Debian 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5906 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-5906-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     April 20, 2025                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : erlang     CVE ID         : CVE-2023-48795 CVE-2025-26618 CVE-2025-30211                      CVE-2025-32433

    Several vulnerabilities were discovered in the Erlang/OTP implementation     of the SSH protocol, which may result in denial of service or the     execution of arbitrary code.

    For the stable distribution (bookworm), these problems have been fixed in     version 1:25.2.3+dfsg-1+deb12u1.

    We recommend that you upgrade your erlang packages.

    For the detailed security status of erlang please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/erlang

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian 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 Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4132 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4132-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                   Bastien Roucaris     April 21, 2025                                https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : erlang     Version        : 1:23.2.6+dfsg-1+deb11u2     CVE ID         : CVE-2023-48795 CVE-2025-26618 CVE-2025-30211 CVE-2025-32433     Debian Bug     : 1059002 1101713 1103442

    Multiple vulnerabilties were fixed in erlang.

    CVE-2023-48795 (Terrapin attack)

        The SSH transport protocol with certain OpenSSH extensions,         allows remote attackers to bypass integrity checks such         that some packets are omitted (from the extension         negotiation message), and a client and server may         consequently end up with a connection for which         some security features have been downgraded.

    CVE-2025-26618

        The SSH transport protocol with certain OpenSSH extensions,         allows remote attackers to bypass integrity checks such         that some packets are omitted (from the extension         negotiation message), and a client and server may         consequently end up with a connection for which         some security features have been downgraded.

    CVE-2025-30211

        The SSH transport protocol with certain OpenSSH extensions,         allows remote attackers to bypass integrity checks such         that some packets are omitted (from the extension         negotiation message), and a client and server may         consequently end up with a connection for which         some security features have been downgraded.

    CVE-2025-32433

        A SSH server may allow an attacker to perform unauthenticated         remote code execution (RCE). By exploiting a flaw in SSH protocol         message handling, a malicious actor could gain unauthorized access         to affected systems and execute arbitrary commands without valid         credentials.

    For Debian 11 bullseye, these problems have been fixed in version     1:23.2.6+dfsg-1+deb11u2.

    We recommend that you upgrade your erlang packages.

    For the detailed security status of erlang please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/erlang

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian 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 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2025:1051-1 advisory.

    - CVE-2025-26618: Fixed incorrect verification of SSH SFTP packet size in Erlang OTP (bsc#1237467)

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 version of erlang installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2025-26618 advisory.

  - Erlang is a programming language and runtime system for building massively scalable soft real-time systems     with requirements on high availability. OTP is a set of Erlang libraries, which consists of the Erlang     runtime system, a number of ready-to-use components mainly written in Erlang. Packet size is not verified     properly for SFTP packets. As a result when multiple SSH packets (conforming to max SSH packet size) are     received by ssh, they might be combined into an SFTP packet which will exceed the max allowed packet size     and potentially cause large amount of memory to be allocated. Note that situation described above can only     happen for successfully authenticated users after completing the SSH handshake. This issue has been     patched in OTP versions 27.2.4, 26.2.5.9, and 25.3.2.18. There are no known workarounds for this     vulnerability. (CVE-2025-26618)

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

The remote SUSE Linux SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2025:0901-1 advisory.

    - CVE-2025-26618: Fixed SSH SFTP packet size not verified properly in Erlang OTP (bsc#1237467).

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 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 host has packages installed that are affected by a vulnerability as referenced in the USN-7313-1 advisory.

    It was discovered that Erlang incorrectly handled SFTP packet sizes. A remote attacker could possibly use     this issue to cause Erlang to consume resources, resulting in a denial of service.

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 version of erlang installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2025-26618 advisory.

  - Erlang is a programming language and runtime system for building massively scalable soft real-time systems     with requirements on high availability. OTP is a set of Erlang libraries, which consists of the Erlang     runtime system, a number of ready-to-use components mainly written in Erlang. Packet size is not verified     properly for SFTP packets. As a result when multiple SSH packets (conforming to max SSH packet size) are     received by ssh, they might be combined into an SFTP packet which will exceed the max allowed packet size     and potentially cause large amount of memory to be allocated. Note that situation described above can only     happen for successfully authenticated users after completing the SSH handshake. This issue has been     patched in OTP versions 27.2.4, 26.2.5.9, and 25.3.2.18. There are no known workarounds for this     vulnerability. (CVE-2025-26618)

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

ID	Name	Product	Family	Type	Severity
365371	Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS : Erlang vulnerabilities (USN-8901-1)	Nessus	Ubuntu Local Security Checks	Local	critical
333784	Photon OS 5.0: Erlang PHSA-2025-5.0-91-0505	Nessus	PhotonOS Local Security Checks	Local	high
239266	TencentOS Server 4: erlang (TSSA-2025:0219)	Nessus	Tencent Local Security Checks	Local	high
234711	Photon OS 5.0: Erlang PHSA-2025-5.0-0505	Nessus	PhotonOS Local Security Checks	Local	high
234690	Debian dsa-5906 : erlang - security update	Nessus	Debian Local Security Checks	Local	critical
234684	Debian dla-4132 : erlang - security update	Nessus	Debian Local Security Checks	Local	critical
234549	Photon OS 4.0: Erlang PHSA-2025-4.0-0782	Nessus	PhotonOS Local Security Checks	Local	high
233486	SUSE SLES15: erlang26 / erlang26-debugger / erlang26-debugger-src / etc (SUSE-SU-2025:1051-1)	Nessus	SuSE Local Security Checks	Local	high
233165	Azure Linux 3.0 Security Update: erlang (CVE-2025-26618)	Nessus	Azure Linux Local Security Checks	Local	high
233040	SUSE SLES15: erlang / erlang-debugger / erlang-debugger-src / erlang-dialyzer / etc (SUSE-SU-2025:0901-1)	Nessus	SuSE Local Security Checks	Local	high
217106	Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 : Erlang vulnerability (USN-7313-1)	Nessus	Ubuntu Local Security Checks	Local	high
217101	CBL Mariner 2.0 Security Update: erlang (CVE-2025-26618)	Nessus	MarinerOS Local Security Checks	Local	high

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CVE-2025-26618

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Tenable Plugins

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