VULNERABILITY INTELLIGENCE

CVE-2026-40542

CVSS score7.3 HIGH
EPSS probability0.54%
CISA KEVNot currently listed
Published2026-04-22
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Description

Missing critical step in authentication in Apache HttpClient 5.6 allows an attacker to cause the client to accept SCRAM-SHA-256 authentication without proper mutual authentication verification. Users are recommended to upgrade to version 5.6.1, which fixes this issue.

Weakness classification

  • security@apache.org: CWE-304
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-325

Primary references