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.
Published: 2026-04-22
Score: 7.3 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

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

Subscriptions

Apache Httpclient
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