CVE-2026-74901
Last modified
CVE-2026-74901 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. openssl_encrypt versions before 1.4.0 contain an authentication bypass vulnerability in pqc.py where AES-GCM decryption failures trigger fallback to unauthenticated AES-CTR mode. Attackers can modify ciphertext in transit to bypass integrity verification and perform bit-flipping attacks without detection.. EPSS estimates a 0.24% chance of exploitation in the next 30 days.
Description
openssl_encrypt versions before 1.4.0 contain an authentication bypass vulnerability in pqc.py where AES-GCM decryption failures trigger fallback to unauthenticated AES-CTR mode. Attackers can modify ciphertext in transit to bypass integrity verification and perform bit-flipping attacks without detection.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Jahlives | Openssl Encrypt | < 1.4.0 |
References
- https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-w4j7-wfgw-r52wMitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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