Vulnerability DatabaseCVE-2026-74890
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CVE-2026-74890
Published:August 17, 2026
Updated:September 01, 2026
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.
Affected Packages
openssl-encrypt (PYTHON):
Affected version(s) >=0.2.2 <1.4.0
Fix Suggestion:
Update to version 1.4.0
Related Resources (4)
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74890.json
https://www.vulncheck.com/advisories/openssl-encrypt-before-hmac-authentication-bypass-via-environment-variable
https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-rvc2-5jxq-gpcj
https://nvd.nist.gov/vuln/detail/CVE-2026-74890
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CVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.5
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Insufficient Verification of Data Authenticity
CWE-345
EPSS
Base Score:
0.17