CVE-2026-86248

Summary

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.

Affected Software

VendorProductVersion RangeStatus
Apache Software FoundationApache Tomcat11.0.0-M14 <= 11.0.25affected
Apache Software FoundationApache Tomcat10.1.22 <= 10.1.59affected
Apache Software FoundationApache Tomcat9.0.92 <= 9.0.121affected

Weaknesses

  • CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: total

References