Critical severity9.8OSV Advisory· Published Aug 17, 2026· Updated Sep 1, 2026
CVE-2026-74901
CVE-2026-74901
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2<1.4.0+ 1 more
- (no CPE)range: <1.4.0
- (no CPE)
Patches
Vulnerability mechanics
References
2- github.com/jahlives/openssl_encrypt/security/advisories/GHSA-w4j7-wfgw-r52wnvdMitigationVendor Advisory
- www.vulncheck.com/advisories/openssl-encrypt-before-authentication-bypass-via-aes-ctr-fallbacknvdThird Party Advisory
News mentions
1- Jahlives openssl_encrypt: 25 Critical Flaws Including Auth Bypass and Sandbox Escapes Disclosed TogetherVypr Intelligence · Aug 17, 2026