PT-2026-61948

Name of the Vulnerable Software and Affected Versions libssh versions prior to 0.11.5-1.1 Description Logic errors in automatic certificate-based public key authentication can cause clients to loop indefinitely when configured certificates are missing or are repeatedly rejected by a server,...

PT-2026-61926

Name of the Vulnerable Software and Affected Versions libssh affected versions not specified Description A flaw exists where a remote authenticated client can send SSH FXP READ requests with an arbitrarily large length. This causes a libssh SFTP server to allocate excessive memory, which can lead...

PT-2026-61847

Name of the Vulnerable Software and Affected Versions libssh affected versions not specified Description A flaw exists in libssh during SFTP server directory listing. The longname field is constructed using unsafe concatenation into a fixed-size stack buffer. An attacker can trigger a stack buffe...

PT-2026-61939

Name of the Vulnerable Software and Affected Versions libssh affected versions not specified Description Incorrect AES-GCM finalization checks in builds using the OpenSSL backend can remove integrity protection. This allows an in-path attacker to modify plaintext during transmission without...

PT-2026-61949

Name of the Vulnerable Software and Affected Versions libssh affected versions not specified Description A flaw exists where data packets processed after a channel is closed can trigger channel data callbacks after the associated data has been freed. This can result in system crashes or...

PT-2026-61857

A flaw was found in libssh. During server-side GSSAPI key exchange, a client-supplied Curve25519 public key shorter than the expected length is copied without proper length validation, leading to an out-of-bounds heap read. This could allow a remote unauthenticated attacker to disclose small...

PT-2026-61858

Name of the Vulnerable Software and Affected Versions libssh affected versions not specified Description A flaw exists where a remote authenticated peer can advertise a zero maximum packet size within the SSH MSG CHANNEL OPEN message. This causes subsequent channel writes to enter an infinite loo...

PT-2026-61936

Name of the Vulnerable Software and Affected Versions libssh affected versions not specified Description A flaw exists in the handling of ProxyCommand where a malicious username expanded through the %r variable can inject shell metacharacters. This can lead to the exposure of environment variable...

PT-2026-61950

A flaw was found in libssh. On servers with GSSAPIKeyExchange enabled, the gssapi-keyex path does not verify whether the authenticated Kerberos principal is authorized for the requested local user, allowing authenticated clients to log in as arbitrary users...

PT-2026-61859

Name of the Vulnerable Software and Affected Versions libssh affected versions not specified Description A flaw exists in libssh when using the ProxyCommand feature. An unchecked failure in the fork function can result in a process ID of -1 being stored. During the cleanup process, signals may be...

Oracle Linux 10 : libssh (ELSA-2026-18160)

The remote Oracle Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-18160 advisory. 0.12.0-2 - Fix the verbosity of some new logs added in 0.12.0 Resolves: RHEL-93748 0.12.0-1 - Rebase to 0.12.0 Resolves: RHEL-133421, RHEL-70825,...

Oracle Linux 9 : libssh (ELSA-2026-18683)

The remote Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-18683 advisory. - Resolves: CVE-2025-4877 - Resolves: CVE-2025-4878 - Resolves: CVE-2025-5351 - Resolves: CVE-2025-8114 - Resolves: CVE-2025-8277 - Resolves:...

Photon OS 5.0: Libssh PHSA-2026-5.0-0782

An update of the libssh package has been released. %NASLMINLEVEL 80900 C Tenable, Inc. The descriptive text and package checks in this plugin were extracted from VMware Security Advisory PHSA-2026-5.0-0782. The text itself is copyright C VMware, Inc. include'compat.inc'; if description...

libssh: Incorrect Return Code Handling in ssh_kdf() in libssh

A flaw was found in libssh versions built with OpenSSL versions older than 3.0, specifically in the sshkdf function responsible for key derivation. Due to inconsistent interpretation of return values where OpenSSL uses 0 to indicate failure and libssh uses 0 for success—the function may mistakenl...

Moderate: Red Hat Security Advisory: libssh security update

An update for libssh is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.6 Telecommunications Update Service. Red Hat Product Security has rated this update as...

RHEL 8 : libssh (RHSA-2026:25911)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:25911 advisory. libssh is a library which implements the SSH protocol. It can be used to implement client and server applications. Security Fixes: libssh: Incorrect...

Updated libssh packages fix security vulnerabilities

CVE-2026-0964 Improper sanitation of paths received from SCP servers CVE-2026-0965 The libssh can attempt to read non-regular files when misconfigured, which could cause resource exhaustion or blocking. CVE-2026-0966 Providing 0-length input for the sshgethexa causes 1-byte buffer underflow on...

EulerOS Virtualization 2.13.0 : libssh (EulerOS-SA-2026-2405)

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...

EulerOS Virtualization 2.13.1 : libssh (EulerOS-SA-2026-2376)

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...

Updated libssh packages fix security vulnerabilities

CVE-2025-4877 Write beyond bounds in binary to base64 conversion functions CVE-2025-4878 Use of uninitialized variable in privatekeyfromfile CVE-2025-5318 Likely read beyond bounds in sftp server handle management CVE-2025-5351 Double free in functions exporting keys CVE-2025-5372 sshkdf returns ...