CVE-2026-55276
Critical
Description
Always-Incorrect Control Flow Implementation vulnerability in Apache Tomcat meant that special roles and empty authorisation constraints were not included when the effective web.xml was logged. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through 9.0.118, from 8.5.0 through 8.5.100. Other versions that have reached end of support may also be affected. Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119 which fixes the issue.
SeverityCritical
CVSS9.1
Exploit probability—
Product
Apache Tomcat
PublishedJun 29, 2026
First seenJun 29, 2026
Weakness typeCWE-670CWE-670
How to fix
Update
- apache tomcat9.0.119, 10.1.56, 11.0.23 or later
- org.apache.tomcat.embed:tomcat-embed-core11.0.23, 10.1.56, 9.0.119 or later
- org.apache.tomcat:tomcat11.0.23, 10.1.56, 9.0.119 or later
- org.apache.tomcat:tomcat-util-scan11.0.23, 10.1.56, 9.0.119 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apache tomcat | v < 9.0.119, 10.1.0 ≤ v < 10.1.56, 11.0.0 ≤ v < 11.0.23 | 9.0.119, 10.1.56, 11.0.23 |
| org.apache.tomcat.embed:tomcat-embed-coreMaven | 11.0.0-M1 ≤ v < 11.0.23, 10.1.0-M1 ≤ v < 10.1.56, 9.0.0.M1 ≤ v < 9.0.119, 8.5.0 ≤ v ≤ 8.5.100 | 11.0.23, 10.1.56, 9.0.119 |
| org.apache.tomcat:tomcatMaven | 11.0.0-M1 ≤ v < 11.0.23, 10.1.0-M1 ≤ v < 10.1.56, 9.0.0.M1 ≤ v < 9.0.119, 8.5.0 ≤ v ≤ 8.5.100 | 11.0.23, 10.1.56, 9.0.119 |
| org.apache.tomcat:tomcat-util-scanMaven | 11.0.0-M1 ≤ v < 11.0.23, 10.1.0-M1 ≤ v < 10.1.56, 9.0.0.M1 ≤ v < 9.0.119, 8.5.0 ≤ v ≤ 8.5.100 | 11.0.23, 10.1.56, 9.0.119 |
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