CVE-2026-86248CWE-287

CVE-2026-86248

Critical · published September 23, 2026

CVSS v3.1
9.8
EPSS
0%
Percentile
31.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00386 · 31.5th percentile
Weakness
CWE-287 · Improper Authentication
Published
2026-09-23T16:17Z
References (1)
https://lists.apache.org/thread/nmkmjp9l53y8h3oc4n8fc0bkw9dv15sk · [email protected]
EPSS history
Timeline
  • 25 SEP 03:28Z
    EPSS moved — → 0%
    epss
  • 23 SEP 11:29Z
    Apache Tomcat: Fix for CVE-2026-34500 was incomplete. OCSP checks sometimes soft-fail with FFM even when soft-fail is disabled
    cvelistv5