CVE-2026-81689 — openssl_encrypt before 1.4.9 Weak Pepper Key Derivation
openssl_encrypt versions before 1.4.9 derive the remote-pepper wrap key using unsalted HKDF-SHA256 or bare SHA-256 of the password, allowing identical keys across all users and …
Published: 2026-08-27 · CVSS: 8.7 · CVSS 4.0
openssl_encrypt versions before 1.4.9 derive the remote-pepper wrap key using unsalted HKDF-SHA256 or bare SHA-256 of the password, allowing identical keys across all users and files. Attackers with access to wrapped pepper blobs can precompute a single dictionary table and perform fleet-wide offline password guessing at hardware speed to recover user passwords.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7