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VULNERABILITIES

CVE-2026-40542 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: redhat-SADPCVSS-B:7.3 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://access.redhat.com/errata/RHSA-2026:60239 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:60246 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:60247 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:60248 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:60249 redhat-SADP

see all 16 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-304Missing Critical Step in Authentication[email protected]
CWE-325Missing Cryptographic Stepredhat-SADP

Affected Products

ProductVersions
apache httpclient
5.6 -

CPE

  • cpe:2.3:a:apache:httpclient:5.6:-:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

14 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-40542
NVD Published Date:
Apr 22, 2026
NVD Last Modified:
Sep 9, 2026
Source:
[email protected]
CVE-2026-40542 Details - Not Deferred