CVE-2026-74890

jahlives openssl_encrypt

Published 17 Aug 2026 · updated 1 Sept 2026 · Analyzed

9.3 Critical · CVSS 4.0, vulncheck.com

Description

openssl_encrypt versions before 1.4.0 contain an authentication bypass vulnerability in CamelliaCipher that disables HMAC tag generation and verification when the PYTEST_CURRENT_TEST environment variable is set. Attackers with code execution can set this environment variable to produce unauthenticated ciphertext and bypass integrity protection on encrypted data.

References

github.com/jahlives/openssl_encrypt/security/advisories/GHSA-rvc2-5jxq-gpcj · Mitigation, Vendor Advisory
www.vulncheck.com/advisories/openssl-encrypt-before-hmac-authentication-bypass-via-environment-variable · Third Party Advisory