| Name | CVE-2026-55955 |
| Description | 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 9.0.18, 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| tomcat10 (PTS) | bookworm | 10.1.52-1~deb12u1 | vulnerable |
| bookworm (security) | 10.1.55-1~deb12u1 | vulnerable | |
| trixie | 10.1.52-1~deb13u1 | vulnerable | |
| trixie (security) | 10.1.55-1~deb13u1 | vulnerable | |
| forky, sid | 10.1.55-1 | vulnerable | |
| tomcat11 (PTS) | trixie | 11.0.15-1~deb13u1 | vulnerable |
| trixie (security) | 11.0.22-1~deb13u1 | vulnerable | |
| forky, sid | 11.0.22-2 | vulnerable | |
| tomcat9 (PTS) | bullseye | 9.0.43-2~deb11u10 | vulnerable |
| bullseye (security) | 9.0.118-0+deb11u1 | fixed | |
| bookworm | 9.0.70-2 | fixed | |
| trixie | 9.0.95-1 | fixed | |
| forky, sid | 9.0.118-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| tomcat10 | source | (unstable) | (unfixed) | |||
| tomcat11 | source | (unstable) | (unfixed) | |||
| tomcat9 | source | (unstable) | 9.0.70-2 |
Starting with 9.0.70-2 src:tomcat9 no longer ships the server stack, using that as the fixed version
https://github.com/apache/tomcat/commit/5e594400c7f6ac0eaf2526bd64442a70f5ccaace (11.0.23)
https://github.com/apache/tomcat/commit/3a9ff01d2dfaca651edacbda3260e37b98b540d3 (10.1.56)
https://github.com/apache/tomcat/commit/6a7a432cd7fb4ef358dc12e8da99cf3ab320f3fe (9.0.119)