CVE-2026-74901 — openssl_encrypt before 1.4.0 Authentication Bypass via AES-CTR Fallback
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…
Published: 2026-08-17 · CVSS: 9.3 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7