VULNERABILITY INTELLIGENCE

CVE-2026-81700

CVSS score9.3 CRITICAL
EPSS probability0.35%
CISA KEVNot currently listed
Published2026-08-27
Last modified2026-09-01
CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Description

openssl_encrypt versions before 1.4.9 contain a signature verification vulnerability in gpg_runner.verify_detached that accepts revoked and expired keys by only checking VALIDSIG status without inspecting REVKEYSIG, EXPKEYSIG, or gpg exit codes. Attackers holding compromised-then-revoked signing keys or expired project keys can bypass signature verification to execute malicious plugins in the host process.

Weakness classification

  • CWE-347: Improper Verification of Cryptographic Signature

Primary references