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Untriaged
Permalink CVE-2026-59847
5.9 MEDIUM
  • CVSS version (CVSS): 3.1
  • Attack Vector (AV): Network (N)
  • Attack Complexity (AC): High (H)
  • Privileges Required (PR): None (N)
  • User Interaction (UI): None (N)
  • Scope (S): Unchanged (U)
  • Confidentiality (C): None (N)
  • Integrity (I): High (H)
  • Availability (A): None (N)
  • Modified Attack Vector (MAV): Network (N)
  • Modified Attack Complexity (MAC): High (H)
  • Modified Privileges Required (MPR): None (N)
  • Modified User Interaction (MUI): None (N)
  • Modified Confidentiality (MC): None (N)
  • Modified Scope (MS): Unchanged (U)
  • Modified Integrity (MI): High (H)
  • Modified Availability (MA): None (N)
created 1 month, 1 week ago Activity log
  • Created suggestion 1 month, 1 week ago
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.

References

Affected products

libssh

Matching in nixpkgs

pkgs.libssh

SSH client library

  • nixos-unstable -
  • nixos-26.05 -

pkgs.libssh2

Client-side C library implementing the SSH2 protocol

  • nixos-unstable -
  • nixos-26.05 -

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