CVE-2026-74889
CriticalCVSS 9.8Summary
openssl_encrypt versions before 1.4.0 use HKDF with no salt and static info parameter in key normalization functions, reducing entropy extraction and determinism. Attackers can exploit predictable key derivation with identical inputs to weaken cryptographic security against multi-target attacks.
Risk Assessment
The risk is that predictable key derivation may facilitate multi-target attacks, potentially leading to encryption compromise.
Recommendation
Upgrade openssl_encrypt to version 1.4.0 or later, which improves HKDF parameters.
Original NVD description (English source)
openssl_encrypt versions before 1.4.0 use HKDF with no salt and static info parameter in key normalization functions, reducing entropy extraction and determinism. Attackers can exploit predictable key derivation with identical inputs to weaken cryptographic security against multi-target attacks.