| Name | CVE-2026-55957 |
| Description | Missing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was configured to authenticate binds using GSSAPI allowed attackers to authenticate without provided the correct password. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.4, from 10.1.0-M1 through 10.1.36, from 9.0.0.M1 through 9.0.100, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Users are recommended to upgrade to version 11.0.5, 10.1.37 or 9.0.101, 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 | fixed |
| bookworm (security) | 10.1.55-1~deb12u1 | fixed | |
| trixie | 10.1.52-1~deb13u1 | fixed | |
| trixie (security) | 10.1.55-1~deb13u1 | fixed | |
| forky, sid | 10.1.55-1 | fixed | |
| tomcat11 (PTS) | trixie | 11.0.15-1~deb13u1 | fixed |
| trixie (security) | 11.0.22-1~deb13u1 | fixed | |
| forky, sid | 11.0.22-2 | fixed | |
| 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 | bookworm | 10.1.52-1~deb12u1 | |||
| tomcat10 | source | trixie | 10.1.52-1~deb13u1 | |||
| tomcat10 | source | (unstable) | 10.1.40-1 | |||
| tomcat11 | source | trixie | 11.0.15-1~deb13u1 | |||
| tomcat11 | source | (unstable) | 11.0.5-1 | |||
| 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/fd96ab415631eea44636c94f911dd38427070ef9 (11.0.5)
https://github.com/apache/tomcat/commit/0cd21c0393b8811af22daddbba7b4e7328e2d79e (10.1.37)
https://github.com/apache/tomcat/commit/c32bbd37ea9ee0aaab848af4ee1c9a76e84240ea (9.0.101)