GHSA-c5ph-rghf-fjfj
Apache Tomcat has an Improper Authentication vulnerability
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Maven | org.apache.tomcat:tomcat | >= 11.0.0-M1, < 11.0.23 | 11.0.23 |
| Maven | org.apache.tomcat:tomcat | >= 10.1.0-M1, < 10.1.56 | 10.1.56 |
| Maven | org.apache.tomcat:tomcat | >= 9.0.13, < 9.0.119 | 9.0.119 |
| Maven | org.apache.tomcat:tomcat | >= 8.5.38, <= 8.5.100 | no fix listed |
| Maven | org.apache.tomcat:tomcat | >= 7.0.100, <= 7.0.109 | no fix listed |
| Maven | org.apache.tomcat:tomcat-tribes | >= 11.0.0-M1, < 11.0.23 | 11.0.23 |
| Maven | org.apache.tomcat:tomcat-tribes | >= 10.1.0-M1, < 10.1.56 | 10.1.56 |
| Maven | org.apache.tomcat:tomcat-tribes | >= 9.0.13, < 9.0.119 | 9.0.119 |
| Maven | org.apache.tomcat:tomcat-tribes | >= 8.5.38, <= 8.5.100 | no fix listed |
| Maven | org.apache.tomcat:tomcat-tribes | >= 7.0.100, <= 7.0.109 | no fix listed |
Details
As written in the advisory (Markdown source, shown as plain text).
Improper Authentication vulnerability in Apache Tomcat allowed a replay attack against the EncryptionInterceptor in the cluster component.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.13 through 9.0.118, from 8.5.38 through 8.5.100, from 7.0.100 through 7.0.109.
Users are recommended to upgrade to version 11.0.23, 10.1.56, 9.0.119, which fixes the issue.
References
External links from the advisory. They lead to third-party sites.
- https://nvd.nist.gov/vuln/detail/CVE-2026-55955
- https://github.com/apache/tomcat/commit/3a9ff01d2dfaca651edacbda3260e37b98b540d3
- https://github.com/apache/tomcat/commit/5e594400c7f6ac0eaf2526bd64442a70f5ccaace
- https://github.com/apache/tomcat/commit/6a7a432cd7fb4ef358dc12e8da99cf3ab320f3fe
- https://github.com/apache/tomcat
- https://lists.apache.org/thread/g4p5sf45p3f9r011pwqs9r54yd64s106
- https://tomcat.apache.org/security-10.html
- https://tomcat.apache.org/security-11.html
- https://tomcat.apache.org/security-9.html
- http://www.openwall.com/lists/oss-security/2026/06/29/24