CVE-2026-55957: CWE-304 Missing Critical Step in Authentication in Apache Software Foundation Apache Tomcat
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.
AI Analysis
Technical Summary
CVE-2026-55957 is a missing critical step in the authentication process within Apache Tomcat when the JNDIRealm is configured to authenticate binds using GSSAPI. This flaw enables attackers to authenticate without providing the correct password. The vulnerability affects Apache Tomcat versions from 7.0.0 through 7.0.109, 8.5.0 through 8.5.100, 9.0.0.M1 through 9.0.100, 10.1.0-M1 through 10.1.36, and 11.0.0-M1 through 11.0.4. The issue is resolved in Apache Tomcat versions 11.0.5, 10.1.37, and 9.0.101.
Potential Impact
An attacker can bypass authentication controls in Apache Tomcat's JNDIRealm with GSSAPI, potentially gaining unauthorized access without valid credentials. This could lead to limited confidentiality, integrity, and availability impacts as indicated by the CVSS vector (C:L/I:L/A:L).
Mitigation Recommendations
Users should upgrade affected Apache Tomcat installations to versions 11.0.5, 10.1.37, or 9.0.101 where the vulnerability is fixed. Patch status is confirmed by the vendor advisory recommending these versions. No other mitigations are specified.
CVE-2026-55957: CWE-304 Missing Critical Step in Authentication in Apache Software Foundation Apache Tomcat
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.
CVSS v3.1
Score 7.3high
Affected software
pkg:maven/org.apache.tomcat/tomcatRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-55957 is a missing critical step in the authentication process within Apache Tomcat when the JNDIRealm is configured to authenticate binds using GSSAPI. This flaw enables attackers to authenticate without providing the correct password. The vulnerability affects Apache Tomcat versions from 7.0.0 through 7.0.109, 8.5.0 through 8.5.100, 9.0.0.M1 through 9.0.100, 10.1.0-M1 through 10.1.36, and 11.0.0-M1 through 11.0.4. The issue is resolved in Apache Tomcat versions 11.0.5, 10.1.37, and 9.0.101.
Potential Impact
An attacker can bypass authentication controls in Apache Tomcat's JNDIRealm with GSSAPI, potentially gaining unauthorized access without valid credentials. This could lead to limited confidentiality, integrity, and availability impacts as indicated by the CVSS vector (C:L/I:L/A:L).
Mitigation Recommendations
Users should upgrade affected Apache Tomcat installations to versions 11.0.5, 10.1.37, or 9.0.101 where the vulnerability is fixed. Patch status is confirmed by the vendor advisory recommending these versions. No other mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-06-17T19:25:28.759Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a42de5e27e9c797198071ac
Added to database: 06/29/2026, 21:06:38 UTC
Last enriched: 07/06/2026, 22:26:59 UTC
Last updated: 08/12/2026, 12:41:10 UTC
Views: 149
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