CVE-2026-86248

9.8 criticalEPSS 0.5%

Critical (9.8). EPSS 0.5% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 42% of CVEs (scores of 2026-10-31)
CWE: CWE-287
Published: 2026-09-23
Modified: 2026-09-23
Record from: the NVD, synced 2026-10-19

References

https://lists.apache.org/thread/nmkmjp9l53y8h3oc4n8fc0bkw9dv15sk

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