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CVE-2026-55957

Apache Tomcat: Authentication bypass with JNDIRealm and GSSAPI authenticated bind

Published: Jun 29, 2026Updated: Jul 2, 2026 Sources: CVE List NVDCWE-304
7.3HIGH
NVD MITRE
EPSS Score
2.9%
Top 14.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:LI:LA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:LAvailability
Low
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Weaknesses

CWE-304

Affected Products

Apache Software Foundation
oss-project·USaka apache foundation
Apache TomcatOn-premWeb App
Networking Infrastructure / load-balancer-proxy
apache
oss-project·USaka apache http server, apache httpd
tomcatOn-premWeb App
Networking Infrastructure / load-balancer-proxy

Exploitability

Official Patch Available
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References

https://lists.apache.org/thread/7fk339o5jvd4mcgsf0chbrn4o525ccjh
lists.apache.org
http://www.openwall.com/lists/oss-security/2026/06/29/26
openwall.com
News mentions
1

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