[ CVE-2026-86248 · Published 23 Sep 2026 ]
Vulnerability in Apache Software Foundation Apache Tomcat
CVSS 9.8
EPSS <1%1 agency advisoryNo fix listed yet
[ Why it matters ]Priority signals
- Critical severity: CVSS 9.8
[ Description ]Official 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.
[ Fixes ]Fixes and patches
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.
[ Advisories ]Government CERT advisories
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CERT-FRCERTFR-2026-AVI-1218
Multiple vulnerabilities in Apache Tomcat Translated from French
Multiple vulnerabilities have been discovered in Apache Tomcat. Some of them allow an attacker to cause remote denial of service, a breach of data integrity and a security policy bypass.