CVE-2026-74888
HighCVSS 7.5Summary
openssl_encrypt versions before 1.4.0 use a non-standard PBKDF2 key derivation construction with iterations=1 per call in an outer loop, creating a KDF whose security properties have not been formally analyzed. Attackers can exploit this weakened key derivation to more efficiently crack passwords protecting legacy encrypted files compared to standard PBKDF2 implementations.
Risk Assessment
The risk is that passwords are more susceptible to brute-force attacks, potentially leading to exposure of encrypted data.
Recommendation
It is recommended to upgrade openssl_encrypt to version 1.4.0 or later, which uses standard PBKDF2 with an appropriate number of iterations.
Original NVD description (English source)
openssl_encrypt versions before 1.4.0 use a non-standard PBKDF2 key derivation construction with iterations=1 per call in an outer loop, creating a KDF whose security properties have not been formally analyzed. Attackers can exploit this weakened key derivation to more efficiently crack passwords protecting legacy encrypted files compared to standard PBKDF2 implementations.