GoAhead TLS Flaws Allow Revoked Client Certificates and Enable Session Decryption

The GoAhead embedded web server loaded a certificate revocation list into its default TLS backend but never turned revocation checking on, so a revoked client certificate could still pass login on affected setups. The flaw is in builds that use the OpenSSL backend with mutual-TLS, where the serve...

Rocky Linux 9 [CIQ] Security Update: libssh / libssh-config / libssh-debuginfo / libssh-debugsource / etc (crlsa-2025_23483)

The Rocky Linux 9 host has packages installed that are affected by a vulnerability as referenced in the CIQ crlsa-202523483 advisory. libssh: Invalid return code for chacha20 poly1305 with OpenSSL backend CVE-2025-5987 Tenable has extracted the preceding description block directly from the CIQ...

Rocky Linux 10.1 [CIQ] Security Update: libssh / libssh-config / libssh-debuginfo / libssh-debugsource / etc (crlsa-2025_23484)

The Rocky Linux 10.1 host has packages installed that are affected by a vulnerability as referenced in the CIQ crlsa-202523484 advisory. libssh: Invalid return code for chacha20 poly1305 with OpenSSL backend CVE-2025-5987 Tenable has extracted the preceding description block directly from the CIQ...

CentOS Linux 8.4 [TuxCare] Security Update: libssh / libssh-config / libssh-devel Multiple Vulnerabilities (CENTOS8.4:CLSA-2026:1786012208)

The CentOS Linux 8.4 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare CENTOS8.4:CLSA-2026:1786012208 advisory. - A flaw was found in libssh. Incorrect AES-GCM finalization checks in builds using the OpenSSL backend can effectively remove...

Amazon Linux 2023 : libssh, libssh-config, libssh-devel (ALAS2023-2026-3096)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-3096 advisory. 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...

CVE-2026-84975

PJSIP versions 2.17 and earlier are affected by a TLS server identity verification bypass in the OpenSSL and GnuTLS backends. The vulnerable code in ssl_sock_ossl.c and ssl_sock_gtls.c copies DNS SubjectAltName values using string functions that recalculate length and truncate an embedded NUL byt...

K000163232: libssh vulnerability CVE-2026-59847

Security Advisory Description A flaw was found in libssh. Incorrect AES-GCM finalization checks in builds using the OpenSSL backend can effectively remove integrity protection, allowing an in-path attacker to modify plaintext on the wire without detection. CVE-2026-59847 Impact There is no impact...

libssh: libssh: integrity downgrade via OpenSSL AES-GCM tag verification

A flaw was found in libssh. Incorrect AES-GCM finalization checks in builds using the OpenSSL backend can effectively remove integrity protection, allowing an in-path attacker to modify plaintext on the wire without detection...

USN-8699-1: libssh vulnerabilities

It was discovered that libssh had a stack buffer overflow in its SFTP server when constructing directory listing entries for long filenames. An attacker could possibly use this issue to cause libssh to crash or execute arbitrary code. This issue only affected Ubuntu 26.04 LTS. CVE-2026-15370 It w...

libgit2: libgit2: Network attacker can intercept HTTPS connections via inverted IP SubjectAltName comparison

A flaw was found in libgit2, a C library for Git functionality. An inverted comparison in the OpenSSL backend's certificate verification logic, specifically when handling IP-literal hosts and certificate IP SubjectAltNames, allows a network attacker to intercept HTTPS connections. By presenting a...

CVE-2026-53583

libgit2 is a portable C implementation of the Git core methods provided as a linkable library with a solid API, allowing to build Git functionality into your application. Prior to 1.8.6 and 1.9.5, verifyservercert in src/libgit2/streams/openssl.c uses an inverted !!memcmp result in the GENIPADD...

CVE-2026-53583 libgit2: Inverted IP SubjectAltName Comparison in OpenSSL Backend

libgit2 is a portable C implementation of the Git core methods provided as a linkable library with a solid API, allowing to build Git functionality into your application. Prior to 1.8.6 and 1.9.5, verifyservercert in src/libgit2/streams/openssl.c uses an inverted !!memcmp result in the GENIPADD...

CVE-2026-53583 libgit2: Inverted IP SubjectAltName Comparison in OpenSSL Backend

libgit2 is a portable C implementation of the Git core methods provided as a linkable library with a solid API, allowing to build Git functionality into your application. Prior to 1.8.6 and 1.9.5, verifyservercert in src/libgit2/streams/openssl.c uses an inverted !!memcmp result in the GENIPADD...

CLSA-2026-1786471937 libssh: Fix of 2 CVEs

CVE-2026-59847: fix AES-GCM tag verification and encryption finalization checks in the OpenSSL backend to preserve integrity protection - CVE-2026-59850: avoid processing DATA packets on remotely closed channels to prevent use-after-free on channel data callbacks...

CLSA-2026-1786448214 libssh: Fix of 2 CVEs

CVE-2026-59847: integrity downgrade of AES-GCM ciphers in the OpenSSL backend, where a wrong EVPDecryptFinal return-code check let a forged authentication tag pass and silently reduced AES-GCM to AES-CTR - CVE-2026-59850: use-after-free via channel data callbacks invoked on remotely-closed...

CLSA-2026-1786012443 libssh: Fix of 2 CVEs

CVE-2026-59847: integrity downgrade of AES-GCM ciphers in the OpenSSL backend, where a wrong EVPDecryptFinal return-code check let a forged authentication tag pass and silently reduced AES-GCM to AES-CTR - CVE-2026-59850: use-after-free via channel data callbacks invoked on remotely-closed...

SUSE CVE-2026-59847

A flaw was found in libssh. Incorrect AES-GCM finalization checks in builds using the OpenSSL backend can effectively remove integrity protection, allowing an in-path attacker to modify plaintext on the wire without detection...

AZL-93246 CVE-2026-59847 affecting package libssh for versions less than 0.10.6-9

A flaw was found in libssh. Incorrect AES-GCM finalization checks in builds using the OpenSSL backend can effectively remove integrity protection, allowing an in-path attacker to modify plaintext on the wire without detection...

CVE-2026-59847

A flaw was found in libssh. Incorrect AES-GCM finalization checks in builds using the OpenSSL backend can effectively remove integrity protection, allowing an in-path attacker to modify plaintext on the wire without detection...

CVE-2026-59847

A flaw was found in libssh. Incorrect AES-GCM finalization checks in builds using the OpenSSL backend can effectively remove integrity protection, allowing an in-path attacker to modify plaintext on the wire without detection...