Vulnerability record · CVE-2026-55957 · published 29 June 2026

CVE-2026-55957: Apache tomcat vulnerability

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.

7.3 CVSS 3.1 High EPSS 2.9% · top 13.8% CWE-304 · CWE-304

7.3CVSS 3.1 base score

2.9%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

2References

2 Jul 2026Last modified by NVD

Description

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Tomcat Apache

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-55957), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.