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.
History

Wed, 22 Apr 2026 17:30:00 +0000

Type Values Removed Values Added
References

Wed, 22 Apr 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 22 Apr 2026 09:45:00 +0000

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First Time appeared Apache
Apache httpclient
Vendors & Products Apache
Apache httpclient

Wed, 22 Apr 2026 07:45:00 +0000

Type Values Removed Values Added
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.
Title Apache HttpClient: SCRAM-SHA-256 mutual authentication bypass may cause the client to accept authentication without proper mutual authentication verification
Weaknesses CWE-304
References

cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published: 2026-04-22T07:07:21.344Z

Updated: 2026-04-22T16:23:59.296Z

Reserved: 2026-04-14T09:11:14.268Z

Link: CVE-2026-40542

cve-icon Vulnrichment

Updated: 2026-04-22T16:23:59.296Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-04-22T08:16:12.780

Modified: 2026-04-22T21:23:52.620

Link: CVE-2026-40542

cve-icon Redhat

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