CVE-2026-55956
Last modified
CVE-2026-55956 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 0.19% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apache | Tomcat | < 9.0.119 |
| Apache | Tomcat | >= 10.1.0, < 10.1.56 |
| Apache | Tomcat | >= 11.0.0, < 11.0.23 |
References
- https://lists.apache.org/thread/dcjdcnnnww9hhdm016hr0l7hpw1bzjfpVendor Advisory, Mailing List
- http://www.openwall.com/lists/oss-security/2026/06/29/25Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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