# CVE-2026-55957

## Summary

- **CVE ID:** CVE-2026-55957
- **Severity:** HIGH
- **CVSS Score:** 7.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
- **CWE:** CWE-304
- **Published:** Jun 29, 2026
- **Last Modified:** Jun 30, 2026

## 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.

## Affected Products

- Apache Software Foundation — Apache Tomcat (11.0.0-M1)
- Apache Software Foundation — Apache Tomcat (10.1.0-M1)
- Apache Software Foundation — Apache Tomcat (9.0.0.M1)
- Apache Software Foundation — Apache Tomcat (8.5.0)
- Apache Software Foundation — Apache Tomcat (7.0.0)
- Apache Software Foundation — Apache Tomcat (0)

## References

- [CNA](https://lists.apache.org/thread/7fk339o5jvd4mcgsf0chbrn4o525ccjh)
- [CVE](http://www.openwall.com/lists/oss-security/2026/06/29/26)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 2.86%
- **EPSS Percentile:** 85.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._