Description
Race condition within a thread vulnerability in Apache Tomcat Native allowed client certificate verification requirements to be down-graded for some configurations.



This issue affects Apache Tomcat Native: from 2.0.0 through 2.0.15, from 1.3.0 through 1.3.8. Unsupported versions may also be affected.



Users are recommended to upgrade to version 2.0.16 or 1.3.9, which fixes the issue.
Published: 2026-09-23
Score: 7.4 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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History

Wed, 23 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 23 Sep 2026 16:00:00 +0000

Type Values Removed Values Added
First Time appeared Apache
Apache apache Tomcat
Vendors & Products Apache
Apache apache Tomcat

Wed, 23 Sep 2026 12:45:00 +0000

Type Values Removed Values Added
Description Race condition within a thread vulnerability in Apache Tomcat Native allowed client certificate verification requirements to be down-graded for some configurations. This issue affects Apache Tomcat Native: from 2.0.0 through 2.0.15, from 1.3.0 through 1.3.8. Unsupported versions may also be affected. Users are recommended to upgrade to version 2.0.16 or 1.3.9, which fixes the issue.
Title Apache Tomcat Native: Client certificate requirements can be down-graded
Weaknesses CWE-366
References

Subscriptions

Apache Apache Tomcat
cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-09-23T15:30:52.270Z

Reserved: 2026-09-06T10:13:13.570Z

Link: CVE-2026-86247

cve-icon Vulnrichment

Updated: 2026-09-23T15:30:49.112Z

cve-icon NVD

Status : Received

Published: 2026-09-23T13:17:31.237

Modified: 2026-09-23T16:16:46.593

Link: CVE-2026-86247

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-23T15:36:41Z

Weaknesses