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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| jahlives | openssl_encrypt | < 1.4.0 | 1.4.0 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | openssl-encrypt | < 1.4.0 | 1.4.0 | PYSEC-2026-3773 |
References
- GitHub Security Advisory (GHSA-w4j7-wfgw-r52w) vendor-advisory
- VulnCheck Advisory: openssl_encrypt before 1.4.0 Authentication Bypass via AES-CTR Fallback third-party-advisory