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Advisory details: gitlab / maven/org.apache.tomcat/tomcat/CVE-2026-55956
Advisory ID gitlab/maven/org.apache.tomcat/tomcat/CVE-2026-55956
Aliases CVE-2026-55956
Summary Improper Authorization vulnerability in Apache Tomcat leads to security constraints specified for the default servlet ignoring any method or method omission configured as part of the constraint. 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, from 7.0.0 through 7.0.109. 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 fix the issue.
Status Published
Exploitability 0.5
Weighted Severity 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (3)
CWE-285 Improper Authorization
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
There are no known severity scores.
Reference id Reference type URL
CVE-2026-55956 https://nvd.nist.gov/vuln/detail/CVE-2026-55956
dcjdcnnnww9hhdm016hr0l7hpw1bzjfp Advisory https://lists.apache.org/thread/dcjdcnnnww9hhdm016hr0l7hpw1bzjfp
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
There are no known vectors.

There are no SSVC decisions available.