Auth bypass in Jahlives OpenSSL Encrypt
CVE-2026-81703
openssl_encrypt versions before 1.4.9 fail to validate encryption status of embedded post-quantum private keys in file metadata. Attackers can craft files with unencrypted embedded PQC keys that decrypt under any password, bypassing authentication and producing attacker-chosen plaintext with false integrity verification.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.002 (11.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 11.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.001
Affected products
Weakness classification (CWE)
References
- GitHub Security Advisory (GHSA-qqfq-g2cv-j7v3) (vendor-advisory, Vendor Advisory)
- VulnCheck Advisory: openssl_encrypt before 1.4.9 Authentication Bypass via Unencrypted PQC Key (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-81703?
- CVE-2026-81703 is a medium-severity vulnerability in Jahlives OpenSSL Encrypt, classified under Improper Authentication. CVSS score: 5.5/10. Published 2026-08-27.
- How severe is CVE-2026-81703?
- Medium severity. CVSS v3 base score is 5.5 out of 10.