CVE-2026-55956

Improper Authorization vulnerability in Apache Tomcat leads to security constraints specified for the default servlet ignoring any method or method omission configured as part of the constraint. 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, from 7.0.0 through 7.0.109. 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 fix the issue.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://lists.apache.org/thread/dcjdcnnnww9hhdm016hr0l7hpw1bzjfp	Vendor Advisory Mailing List
http://www.openwall.com/lists/oss-security/2026/06/29/25	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, 19:03

Type	Values Removed	Values Added
References	~~() https://lists.apache.org/thread/dcjdcnnnww9hhdm016hr0l7hpw1bzjfp -~~	() https://lists.apache.org/thread/dcjdcnnnww9hhdm016hr0l7hpw1bzjfp - Vendor Advisory, Mailing List
References	~~() http://www.openwall.com/lists/oss-security/2026/06/29/25 -~~	() http://www.openwall.com/lists/oss-security/2026/06/29/25 - Third Party Advisory
CPE		cpe:2.3:a:apache:tomcat::::::::
First Time		Apache tomcat Apache

30 Jun 2026, 14:16

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 6.5

29 Jun 2026, 23:16

Type	Values Removed	Values Added
References		() http://www.openwall.com/lists/oss-security/2026/06/29/25 -

29 Jun 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-29 21:16

Updated : 2026-07-02 19:03

NVD link : CVE-2026-55956

Mitre link : CVE-2026-55956

CVE.ORG link : CVE-2026-55956

JSON object : View

Products Affected

apache

tomcat

CWE

CWE-285

Improper Authorization

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