CVE-2026-55276

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.

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://lists.apache.org/thread/jy09xjlzn6r2qwvqoph8vcmf959yq68v	Vendor Advisory Mailing List
http://www.openwall.com/lists/oss-security/2026/06/29/23	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, 19:05

Type	Values Removed	Values Added
CPE		cpe:2.3:a:apache:tomcat::::::::
First Time		Apache tomcat Apache
References	~~() https://lists.apache.org/thread/jy09xjlzn6r2qwvqoph8vcmf959yq68v -~~	() https://lists.apache.org/thread/jy09xjlzn6r2qwvqoph8vcmf959yq68v - Vendor Advisory, Mailing List
References	~~() http://www.openwall.com/lists/oss-security/2026/06/29/23 -~~	() http://www.openwall.com/lists/oss-security/2026/06/29/23 - Third Party Advisory

30 Jun 2026, 15:16

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 9.1

29 Jun 2026, 23:16

Type	Values Removed	Values Added
References		() http://www.openwall.com/lists/oss-security/2026/06/29/23 -

29 Jun 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-29 21:16

Updated : 2026-07-02 19:05

NVD link : CVE-2026-55276

Mitre link : CVE-2026-55276

CVE.ORG link : CVE-2026-55276

JSON object : View

Products Affected

apache

tomcat

CWE

CWE-670

Always-Incorrect Control Flow Implementation

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