libssh: libssh: use-after-free via data callbacks on closed channels

A flaw was found in libssh. If data packets are processed after a channel is closed, channel data callbacks can be invoked after the associated data has already been freed, leading to crashes or possible use-after-free conditions...

EUVD-2026-46254

A flaw was found in libssh. A malicious username expanded through %r in ProxyCommand handling can inject shell metacharacters, exposing environment variables and causing unintended shell behavior...

UBUNTU-CVE-2026-59844

A flaw was found in libssh. A remote authenticated client can issue SSHFXPREAD requests with an arbitrarily large length, causing a libssh SFTP server to allocate excessive memory and potentially exhaust it through repeated requests...

Security update for buildah

This update for buildah fixes the following issues CVE-2026-25680,CVE-2026-25681,CVE-2026-27136,CVE-2026-42502,CVE-2026-42506: golang.org/x/net/html: multiple issues when parsing HTML files bsc1267179. CVE-2026-34986: github.com/go-jose/go-jose/v4,github.com/go-jose/go-jose/v3: crafted JWE input...

golang.org/x/crypto: Invoking VerifiedPublicKeyCallback permissions skip enforcement

Previously, CVE-2024-45337 fixed an authorization bypass for misused ssh server configurations; if any other type of callback is passed other than public key, then the source-address validation would be skipped...

CVE-2026-55200

libssh2 through 1.11.1, fixed in commit 7acf3df contains an out-of-bounds write vulnerability in ssh2transportread that fails to enforce upper bounds on packetlength field. Remote attackers can send crafted SSH packets with excessively large packetlength values to corrupt heap memory and achieve...

RHSA-2026:25911 Red Hat Security Advisory: libssh security update

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EulerOS Virtualization 2.12.1 : libssh (EulerOS-SA-2026-2080)

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...

Invoking pathological RSA/DSA parameters may cause DoS in golang.org/x/crypto/ssh

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USN-8309-1 libssh2 vulnerability

It was discovered that libssh2 incorrectly handled username and password length values during SSH password authentication. A remote attacker could possibly use this issue to cause a denial of service...

phpseclib has a variable-time HMAC comparison in SSH2::get_binary_packet() using != instead of hash_equals()

phpseclib SSH2: Variable-time comparison in HMAC verification Summary phpseclib\Net\SSH2::getbinarypacket uses PHP's != operator to compare a received SSH packet HMAC against the locally computed HMAC. != on equal-length binary strings in PHP uses memcmp, which short-circuits on the first differi...

OESA-2026-1653 libssh security update

The ssh library was designed to be used by programmers needing a working SSH implementation by the mean of a library. The complete control of the client is made by the programmer. With libssh, you can remotely execute programs, transfer files, use a secure and transparent tunnel for your remote...

CVE-2026-3731

A weakness has been identified in libssh up to 0.11.3. The impacted element is the function sftpextensionsgetname/sftpextensionsgetdata 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 ...

libssh 安全漏洞

libssh is a C-language development package from the libssh organization, designed for accessing SSH services. It can execute remote commands, perform file transfers, and provide a secure transmission channel for remote programs. libssh has a security vulnerability, which stems from an overflow in...

CVE-2025-47913

SSH clients receiving SSHAGENTSUCCESS when expecting a typed response will panic and cause early termination of the client process...

RHSA-2025:19101 Red Hat Security Advisory: libssh security update

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[SECURITY] Fedora 41 Update: libssh-0.11.3-1.fc41

The ssh library was designed to be used by programmers needing a working SSH implementation by the mean of a library. The complete control of the client is made by the programmer. With libssh, you can remotely execute programs, trans fer files, use a secure and transparent tunnel for your remote...

Linux Distros Unpatched Vulnerability : CVE-2017-3204

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - The Go SSH library x/crypto/ssh by default does not verify host keys, facilitating man-in-the-middle attacks. Default behavior changed in commit e4e2799 to...

Photon OS 4.0: Libssh PHSA-2025-4.0-0856

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-2025-4.0-0856. The text itself is copyright C VMware, Inc. include'compat.inc'; if description...

CVE-2025-5449

A flaw was found in the SFTP server message decoding logic of libssh. The issue occurs due to an incorrect packet length check that allows an integer overflow when handling large payload sizes on 32-bit systems. This issue leads to failed memory allocation and causes the server process to crash,...