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.
- Published Aug 27, 2026
- CVSS 8.7 high
- 0.2% chance of exploitation in the next 30 days (EPSS)
- A fix is available