CVE-2026-74888 — openssl_encrypt before 1.4.0 Non-Standard PBKDF2 Key Derivation
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…
Published: 2026-08-17 · CVSS: 8.7 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7