CVE Vulnerabilities

CVE-2026-55276

Always-Incorrect Control Flow Implementation

Published: Jun 29, 2026 | Modified: Oct 25, 2026
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
RedHat/V2
RedHat/V3
2.3 LOW
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Ubuntu
MEDIUM

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.

Weakness

The code contains a control flow path that does not reflect the algorithm that the path is intended to implement, leading to incorrect behavior any time this path is navigated.

Affected Software

NameVendorStart VersionEnd Version
TomcatApache*9.0.119 (excluding)
TomcatApache10.1.0 (including)10.1.56 (excluding)
TomcatApache11.0.0 (including)11.0.23 (excluding)
Red Hat Enterprise Linux 10RedHattomcat9-1:9.0.120-1.el10_2*
Red Hat Enterprise Linux 10.0 Extended Update SupportRedHattomcat9-1:9.0.120-1.el10_0*
Red Hat Enterprise Linux 8RedHattomcat-1:9.0.120-1.el8_10*
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRedHattomcat-1:9.0.120-1.el8_8*
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRedHattomcat-1:9.0.120-1.el8_8*
Red Hat Enterprise Linux 9RedHattomcat-1:9.0.120-2.el9_8*
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRedHattomcat-1:9.0.120-1.el9_2*
Red Hat Enterprise Linux 9.4 Update Services for SAP SolutionsRedHattomcat-1:9.0.120-1.el9_4*
Red Hat Enterprise Linux 9.6 Extended Update SupportRedHattomcat-1:9.0.120-1.el9_6*
Red Hat JBoss Web Server 6.2.5RedHattomcat-catalina*
Red Hat JBoss Web Server 6.2 on RHEL 10RedHatjws6-tomcat-0:10.1.49-16.redhat_00016.1.el10jws*
Red Hat JBoss Web Server 6.2 on RHEL 8RedHatjws6-tomcat-0:10.1.49-16.redhat_00016.1.el8jws*
Red Hat JBoss Web Server 6.2 on RHEL 9RedHatjws6-tomcat-0:10.1.49-16.redhat_00016.1.el9jws*
Red Hat JBoss Web Server 7.0.1RedHattomcat-catalina*
Red Hat JBoss Web Server 7.0 on RHEL 10RedHatjws7-tomcat-0:11.0.21-6.redhat_00005.1.el10jws*
Red Hat JBoss Web Server 7.0 on RHEL 8RedHatjws7-tomcat-0:11.0.21-6.redhat_00005.1.el8jws*
Red Hat JBoss Web Server 7.0 on RHEL 9RedHatjws7-tomcat-0:11.0.21-6.redhat_00005.1.el9jws*
Red Hat Hardened ImagesRedHattomcat10-main-10.1.56-1.hum1*
Red Hat Hardened ImagesRedHattomcat11-main-11.0.23-0.1.hum1*
Tomcat10Ubuntuquesting*
Tomcat11Ubuntuquesting*
Tomcat6Ubuntuupstream*
Tomcat7Ubuntuesm-infra-legacy/trusty*
Tomcat7Ubuntuupstream*
Tomcat8Ubuntuesm-apps/bionic*
Tomcat8Ubuntuesm-infra-legacy/xenial*
Tomcat8Ubuntuupstream*
Tomcat9Ubuntuquesting*

References