CVE-2026-74890

PYSEC-2026-3766 · CVE-2026-74890 · GHSA-rvc2-5jxq-gpcj

Published Aug 17, 2026 · Modified Sep 2, 2026

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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

ADVISORY https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-rvc2-5jxq-gpcj
ADVISORY https://www.vulncheck.com/advisories/openssl-encrypt-before-hmac-authentication-bypass-via-environment-variable

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CVE-2026-74890

Description

References

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