VULNERABILITY INTELLIGENCE

CVE-2026-74871

CVSS score6.2 MEDIUM
EPSS probability0.11%
CISA KEVNot currently listed
Published2026-08-17
Last modified2026-09-10
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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.

Weakness classification

  • disclosure@vulncheck.com: CWE-916

Primary references