Auth bypass in Apache Tomcat
CVE-2026-29145
CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled vulnerability in Apache Tomcat, Apache Tomcat Native. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M7 through 10.1.52, from 9.0.83 through 9.0.115; Apache Tomcat Native: from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39, from 1.3.0 through 1.3.6, from 2.0.0 through 2.0.13. Users are recommended to upgrade to version Tomcat Native 1.3.7 or 2.0.14 and Tomcat 11.0.20, 10.1.53 and 9.0.116, which fix the issue.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.007 (53.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Apache Tomcat — versions 10.1.0
- Apache Tomcat Native
- Apache Software Foundation Tomcat — versions 11.0.0-M1, 10.1.0-M7, 9.0.83
- Apache Software Foundation Tomcat Native — versions 1.1.23, 1.2.0, 1.3.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.apache.org/thread/yz5fxmhd2j43wgqykssdo7kltws57jfz (vendor-advisory, Mailing List, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-29145?
- CVE-2026-29145 is a critical-severity vulnerability in Apache Tomcat, classified under Improper Authentication. CVSS score: 9.1/10. Published 2026-04-09.
- How severe is CVE-2026-29145?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2026-29145 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.