CVE-2026-74871

MediumCVSS 5.5/10Last modified Sep 10, 2026

Description

openssl_encrypt versions before 1.4.6 contain a key derivation flaw in sequential XOR composition mode where the last stage cancels out during key generation. When configured with a single KDF and no prior hashing stage, attackers can bypass memory-hard key derivation and perform offline password cracking at SHA-256 speed instead of the configured KDF cost.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-916

Affected software

No affected versions have been published.

Timeline

Published
Aug 17, 2026
Last modified
Sep 10, 2026
NVD status
Analyzed

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CVE-2026-74871: Medium severity, CVSS 5.5 | Vulnix