CVE-2026-55276

CRITICAL

Apache Tomcat: Logged effective web.xml is incomplete

Title source: cna
STIX 2.1

Description

Always-Incorrect Control Flow Implementation vulnerability in Apache Tomcat meant that special roles and empty authorisation constraints were not included when the effective web.xml was logged. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through 9.0.118, from 8.5.0 through 8.5.100. Other versions that have reached end of support may also be affected. Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119 which fixes the issue.

References (2)

Core 2

Scores

CVSS v3 9.1
EPSS 0.0037
EPSS Percentile 28.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-670
Status published
Products (6)
apache/tomcat < 9.0.119
Apache Software Foundation/Apache Tomcat < 8.0.0
Apache Software Foundation/Apache Tomcat 10.1.0-M1 - 10.1.55
Apache Software Foundation/Apache Tomcat 11.0.0-M1 - 11.0.22
Apache Software Foundation/Apache Tomcat 8.5.0 - 8.5.100
Apache Software Foundation/Apache Tomcat 9.0.0.M1 - 9.0.118
Published Jun 29, 2026
Tracked Since Jun 30, 2026