VULNERABILITY INTELLIGENCE

CVE-2026-81689

CVSS score7.5 HIGH
EPSS probability0.27%
CISA KEVNot currently listed
Published2026-08-27
Last modified2026-09-03
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Description

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.

Weakness classification

  • disclosure@vulncheck.com: CWE-916

Primary references