{"id":"CVE-2026-81700","aliases":["PYSEC-2026-3777","GHSA-x38r-8wf3-q9hq"],"title":"openssl_encrypt versions before 1.4.9 contain a signature verification vulnerability in gpg_runner.verify_detached that accepts revoked a…","summary":"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 exi…","severity":"none","vendor":"openssl-encrypt","product":"openssl-encrypt","ecosystem":"pip","affected":["openssl-encrypt < 1.4.9"],"patched":["openssl-encrypt 1.4.9"],"published":"2026-08-27","updated":"2026-09-02","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/PYSEC-2026-3777","references":[{"url":"https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-x38r-8wf3-q9hq"},{"url":"https://www.vulncheck.com/advisories/openssl-encrypt-before-1.4.9-gpg-signature-verification-bypass"}],"tags":["osv","pip"],"epss":0.00241,"epssPercentile":0.15543,"ingestedAt":"2026-09-02T19:31:26.115Z","slug":"CVE-2026-81700","body":"## Overview\n\nopenssl_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.\n\n## Affected packages\n\n- `openssl-encrypt < 1.4.9`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `openssl-encrypt 1.4.9`","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}