CVE-2026-74890 — openssl_encrypt before 1.4.0 HMAC Authentication Bypass via Environment Variable
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…
Published: 2026-08-17 · CVSS: 9.3 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7