CVE-2026-55957
Public on 2026-06-29
Modified on 2026-07-01
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.
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.
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 2 - Core | tomcat | Pending Fix | ||
| Amazon Linux 2 - Tomcat9 Extra | tomcat | 2025-04-01 | ALAS2TOMCAT9-2025-016 | Fixed |
| Amazon Linux 2 - Tomcat8.5 Extra | tomcat | No Fix Planned | ||
| Amazon Linux 2023 | tomcat10 | 2025-04-01 | ALAS2023-2025-910 | Fixed |
| Amazon Linux 2023 | tomcat9 | 2025-04-01 | ALAS2023-2025-911 | Fixed |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |