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.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-v468-qcjx-r72w Apache HttpClient accepts SCRAM-SHA-256 authentication without proper mutual authentication verification
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 05 May 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-325
References
Metrics threat_severity

None

threat_severity

Important


Fri, 01 May 2026 17:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:apache:httpclient:5.6:-:*:*:*:*:*:*

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

Type Values Removed Values Added
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

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

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 : Analyzed

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

Modified: 2026-05-01T17:12:59.940

Link: CVE-2026-40542

cve-icon Redhat

Severity : Important

Publid Date: 2026-04-22T07:07:21Z

Links: CVE-2026-40542 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-05-05T01:30:12Z

Weaknesses