by Kastro
Paper/Archive/CVE-2026-81700

CVE-2026-81700

jahlives openssl_encrypt — openssl_encrypt before 1.4.9 GPG Signature Verification Bypass

EPSS 0.4%CVSS 9.8
critical.is priorityof 100
35
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 28.7.287 × 205.7No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
openssl_encrypt< 1.4.91.4.9CNA

Scores by source

VulnCheck (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

advisorygithub.com/jahlives/openssl_encrypt/security/advisories/GHSA-x38r-8wf3-q9hqwriteupvulncheck.com/advisories/openssl-encrypt-before-1.4.9-gpg-signature-verification-bypass