CVE-2026-74901

Critical

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.

SeverityCritical

CVSS9.8

Exploit probability—

ProductJahlives Openssl Encrypt

PublishedAug 17, 2026

First seenAug 17, 2026

Weakness typeCWE-347CWE-347

How to fix

Update

jahlives openssl_encrypt1.4.0 or later
openssl-encrypt1.4.0 or later

Vendor advisories

github.com/jahlives/openssl_encrypt/security/advisories/GHSA-w4j7-wfgw-r52w

Affected products

Product	Affected versions	Fixed in
jahlives openssl_encrypt	v < 1.4.0	1.4.0
openssl-encryptPyPI	v < 1.4.0	1.4.0

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