CVE-2026-74890

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.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

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

Configurations

Configuration 1 (hide)

cpe:2.3:a:jahlives:openssl_encrypt:*:*:*:*:*:python:*:*

History

23 Oct 2026, 23:10

Type	Values Removed	Values Added
Summary		(es) Las versiones de openssl_encrypt anteriores a 1.4.0 contienen una vulnerabilidad de omisión de autenticación en CamelliaCipher que deshabilita la generación y verificación de etiquetas HMAC cuando la variable de entorno PYTEST_CURRENT_TEST está configurada. Atacantes con ejecución de código pueden configurar esta variable de entorno para producir texto cifrado no autenticado y omitir la protección de integridad en los datos cifrados.

Information

Published : 2026-08-17 11:16

Updated : 2026-10-24 13:10

NVD link : CVE-2026-74890

Mitre link : CVE-2026-74890

CVE.ORG link : CVE-2026-74890

JSON object : View

Products Affected

jahlives

openssl_encrypt

CWE

CWE-345

Insufficient Verification of Data Authenticity

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