Critical severity9.8NVD Advisory· Published Aug 17, 2026

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.

Affected products

Jahlives/openssl_encryptllm-fuzzy
Range: <1.4.0

Patches

Vulnerability mechanics

References

github.com/jahlives/openssl_encrypt/security/advisories/GHSA-w4j7-wfgw-r52wnvd
www.vulncheck.com/advisories/openssl-encrypt-before-authentication-bypass-via-aes-ctr-fallbacknvd

News mentions

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