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CVE-2026-86248 Details

Description

CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M14 through 11.0.25, from 10.1.22 through 10.1.59, from 9.0.92 through 9.0.121. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: CISA-ADPCVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://lists.apache.org/thread/nmkmjp9l53y8h3oc4n8fc0bkw9dv15sk	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-287	Improper Authentication	CISA-ADP

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Sep 23, 2026	CVE Modified	CISA-ADP
Sep 23, 2026	New CVE Received	[email protected]