HIGHVulnerability
CVE-2026-81689
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.
Properties
- severity
- HIGH
- score
- 7.5
- epss_score
- 0.00198
- cve_id
- CVE-2026-81689
- vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- published_at
- 2026-08-27T17:20:58.697
- last_modified
- 2026-09-03T15:07:51.097
- epss_percentile
- 0.09659
Related Entities (4)
ENRICHED_BY (1)
→[Source]FIRST EPSS
HAS_WEAKNESS (1)
→[Weakness]Use of Password Hash With Insufficient Computational Effort
DESCRIBED_BY (1)
→[Source]NVD
AFFECTS_PRODUCT (1)
→[Product]
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