CVE-2026-74901: Jahlives OpenSSL Encrypt

Critical severity, CVSS 9.8. EPSS: 0.4% chance of exploitation in the next 30 days.

openssl_encrypt versions before 1.4.0 contain an authentication bypass vulnerability in pqc.py where AES-GCM decryption failures trigger fallback to unauthenticated AES-CTR mode. Attackers can modify ciphertext in transit to bypass integrity verification and perform bit-flipping attacks without detection.

Affected products

• Jahlives OpenSSL Encrypt: before 1.4.0 (fixed in 1.4.0)

Published 2026-08-17. Last modified 2026-09-01.