CVE-2026-55957
Apache Tomcat: Authentication bypass with JNDIRealm and GSSAPI authenticated bind
7.3
HIGH
CVSS 3.1
EPSS 0.46%
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 through 11.0.4, from 10.1.0 through 10.1.36, from 9.0.0 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.
How to fix CVE-2026-55957
To remediate CVE-2026-55957, upgrade the affected package to a fixed version below.
- —upgrade to 9.0.101 or later
Is CVE-2026-55957 being exploited?
Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 9.0.101, >= 10.1.0, < 10.1.37, >= 11.0.0, < 11.0.5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |