CVE-2026-55276

CriticalCVSS 9.1/10Last modified Jul 2, 2026

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.

Metrics

CVSS 3.1 9.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-670

Affected software

No affected versions have been published.

Timeline

Published
Jun 29, 2026
Last modified
Jul 2, 2026
NVD status
Analyzed

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CVE-2026-55276: Critical severity, CVSS 9.1 | Vulnix