Critical severity · published Sep 23, 2026
CVE-2026-86248
Apache Tomcat: Fix for CVE-2026-34500 was incomplete. OCSP checks sometimes soft-fail with FFM even when soft-fail is disabled
9.8
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TO
Tomcat · Apache
11.0.0-M14 through 11.0.25; 10.1.22 through 10.1.59; 9.0.92 through 9.0.121 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-86248
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-86248
lists.apache.org
https://lists.apache.org/thread/nmkmjp9l53y8h3oc4n8fc0bkw9dv15sk
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