Medium severity · published Apr 9, 2026
CVE-2026-34500
Apache Tomcat: OCSP checks sometimes soft-fail with FFM even when soft-fail is disabled
6.5
CVSS
0.4%
EPSS
No
On KEV
Description
CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled and FFM is used in Apache Tomcat.
This issue affects Apache Tomcat: from 11.0.0-M14 through 11.0.20, from 10.1.22 through 10.1.53, from 9.0.92 through 9.0.116.
Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fixes the issue.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 39% 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 11.0.20; 10.1.22 through 10.1.53; 9.0.92 through 9.0.116 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-34500
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-34500
Vendor Advisory
https://lists.apache.org/thread/7rcl4zdxryc8hy3htyfyxkbqpxjtfdl2
Mailing List
http://www.openwall.com/lists/oss-security/2026/04/09/29
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