CVE-2026-55957

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 7.3 HIGH

7.3^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://lists.apache.org/thread/7fk339o5jvd4mcgsf0chbrn4o525ccjh	Vendor Advisory Mailing List
http://www.openwall.com/lists/oss-security/2026/06/29/26	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:apache:tomcat::::::::
	cpe:2.3:a:apache:tomcat::::::::
	cpe:2.3:a:apache:tomcat::::::::

History

02 Jul 2026, 19:01

Type	Values Removed	Values Added
CPE		cpe:2.3:a:apache:tomcat::::::::
First Time		Apache tomcat Apache
References	~~() https://lists.apache.org/thread/7fk339o5jvd4mcgsf0chbrn4o525ccjh -~~	() https://lists.apache.org/thread/7fk339o5jvd4mcgsf0chbrn4o525ccjh - Vendor Advisory, Mailing List
References	~~() http://www.openwall.com/lists/oss-security/2026/06/29/26 -~~	() http://www.openwall.com/lists/oss-security/2026/06/29/26 - Third Party Advisory

30 Jun 2026, 14:16

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.3

29 Jun 2026, 23:16

Type	Values Removed	Values Added
References		() http://www.openwall.com/lists/oss-security/2026/06/29/26 -

29 Jun 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-29 21:16

Updated : 2026-07-02 19:01

NVD link : CVE-2026-55957

Mitre link : CVE-2026-55957

CVE.ORG link : CVE-2026-55957

JSON object : View

Products Affected

apache

tomcat

CWE

CWE-304

Missing Critical Step in Authentication

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