CVE-2026-81700
openssl_encrypt before 1.4.9 GPG Signature Verification Bypass
- State
- Published
- Severity
- 9.3 Critical
- Published
- Aug 27, 2026
- Updated
- Oct 1, 2026
- Reserved
- Aug 27, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-347 Improper Verification of Cryptographic Signature
Affected Products
| Product | Versions |
|---|---|
openssl_encryptjahlives |
|
References
- GitHub Security Advisory (GHSA-x38r-8wf3-q9hq)vendor-advisory
- VulnCheck Advisory: openssl_encrypt before 1.4.9 GPG Signature Verification Bypassthird-party-advisory
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.