Vulnerability in Jahlives OpenSSL Encrypt
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.002 (10.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 10.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.001
Affected products
- Jahlives OpenSSL Encrypt — versions 0, 1.4.0
Weakness classification (CWE)
References
- GitHub Security Advisory (GHSA-rvc2-5jxq-gpcj) (vendor-advisory, Mitigation, Vendor Advisory)
- VulnCheck Advisory: openssl_encrypt before 1.4.0 HMAC Authentication Bypass via Environment Variable (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-74890?
- CVE-2026-74890 is a medium-severity vulnerability in Jahlives OpenSSL Encrypt, classified under Insufficient Verification of Data Authenticity. CVSS score: 5.5/10. Published 2026-08-17.
- How severe is CVE-2026-74890?
- Medium severity. CVSS v3 base score is 5.5 out of 10.