CVE-2026-74889

CriticalCVSS 9.8/10Last modified Sep 1, 2026

Description

openssl_encrypt versions before 1.4.0 use HKDF with no salt and static info parameter in key normalization functions, reducing entropy extraction and determinism. Attackers can exploit predictable key derivation with identical inputs to weaken cryptographic security against multi-target attacks.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-326

Affected software

No affected versions have been published.

Timeline

Published
Aug 17, 2026
Last modified
Sep 1, 2026
NVD status
Analyzed

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CVE-2026-74889: Critical severity, CVSS 9.8 | Vulnix