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CVE-2026-55957 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: CISA-ADPCVSS-B:7.3 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
http://www.openwall.com/lists/oss-security/2026/06/29/26	CVE	Third Party Advisory
https://lists.apache.org/thread/7fk339o5jvd4mcgsf0chbrn4o525ccjh	[email protected]	Vendor AdvisoryMailing List

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-304	Missing Critical Step in Authentication	[email protected]

Affected Products

Product	Versions
apache tomcat	< 9.0.101 >= 10.1.0, < 10.1.37 >= 11.0.0, < 11.0.5
CPE cpe:2.3:a:apache:tomcat:::::::: Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Jul 2, 2026	Initial Analysis	[email protected]
Jun 30, 2026	CVE Modified	CISA-ADP
Jun 29, 2026	CVE Modified	CVE
Jun 29, 2026	New CVE Received	[email protected]