VULNERABILITY INTELLIGENCE

CVE-2026-74901

CVSS score9.8 CRITICAL
EPSS probability0.40%
CISA KEVNot currently listed
Published2026-08-17
Last modified2026-09-01
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

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.

Weakness classification

  • disclosure@vulncheck.com: CWE-347

Primary references