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Description

Improper Handling of Case Sensitivity vulnerability in Apache Tomcat's GCI servlet allows security constraint bypass of security constraints that apply to the pathInfo component of a URI mapped to the CGI servlet.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.6, from 10.1.0-M1 through 10.1.40, from 9.0.0.M1 through 9.0.104.
The following versions were EOL at the time the CVE was created but are
known to be affected: 8.5.0 though 8.5.100. Other, older, EOL versions
may also be affected.

Users are recommended to upgrade to version 11.0.7, 10.1.41 or 9.0.105, which fixes the issue.

Affected products

VendorProductAffectedFixed
Apache Software Foundation Apache Tomcat 11.0.0-M1 – ≤ 11.0.6, 10.1.0-M1 – ≤ 10.1.40, 9.0.0.M1 – ≤ 9.0.104, 8.5.0 – ≤ 8.5.100 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 tomcat10 10.1.46-1 —
Debian 14 tomcat11 11.0.11-1 —
Debian 14 tomcat9 9.0.70-2 —
Debian 13 tomcat10 10.1.52-1~deb13u1 DSA-6120-1
Debian 13 tomcat11 11.0.15-1~deb13u1 DSA-6121-1
Debian 13 tomcat9 9.0.70-2 —
Debian 12 tomcat10 10.1.52-1~deb12u1 DSA-6120-1
Debian 12 tomcat9 9.0.70-2 —
Debian 11 tomcat9 9.0.107-0+deb11u1 DLA-4244-1
ReleasePackageFixed inAdvisory
Ubuntu 26.04 LTS tomcat11 No fix yet —
Ubuntu 25.10 tomcat11 No fix yet —
Show 6 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro 24.04 LTS tomcat10 10.1.16-1ubuntu0.1~esm3 USN-7705-1
Ubuntu Pro 22.04 LTS tomcat9 No fix yet —
Ubuntu Pro 20.04 LTS tomcat9 No fix yet —
Ubuntu Pro 18.04 LTS tomcat8 +1 No fix yet —
Ubuntu Pro 16.04 LTS tomcat7 +1 No fix yet —
Ubuntu Pro 14.04 LTS tomcat6 +1 No fix yet —
ReleasePackageFixed inAdvisory
RHEL 10 tomcat +7 1:10.1.49-1.el10 RHSA-2026:18537
RHEL 10 tomcat9 +7 1:9.0.110-2.el10_2 RHSA-2026:18536
RHEL 9 tomcat +7 1:9.0.110-2.el9_8 RHSA-2026:18916
RHEL 8 tomcat +7 1:9.0.120-1.el8_10 RHSA-2026:68677
Show 7 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
RHEL 10.0 EUS tomcat9 +7 1:9.0.120-1.el10_0 RHSA-2026:67163
RHEL 9.6 EUS tomcat +7 1:9.0.120-1.el9_6 RHSA-2026:68659
RHEL 9.4 E4S tomcat +7 1:9.0.120-1.el9_4 RHSA-2026:68679
RHEL 9.2 E4S tomcat +7 1:9.0.120-1.el9_2 RHSA-2026:68678
RHEL 8.8 TUS tomcat +7 1:9.0.120-1.el8_8 RHSA-2026:68680
RHEL 8.8 E4S tomcat +7 1:9.0.120-1.el8_8 RHSA-2026:68680
Red Hat JBoss Web Server 6 jws6-tomcat +9 10.1.49-7.redhat_00006.1.el8jws RHSA-2026:2740

AlmaLinux

Errata ↗
ReleasePackageFixed inAdvisory
AlmaLinux 8 tomcat +7 1:9.0.120-1.el8_10 ALSA-2026:68677

Rocky Linux

Errata ↗
ReleasePackageFixed inAdvisory
Rocky Linux 10 tomcat 1:10.1.49-1.el10_2.1 RLSA-2026:18537
ReleasePackageFixed inAdvisory
SLES 15 SP7 tomcat 9.0.106-150200.86.1 SUSE-SU-2025:02280-1
SLES 15 SP7 tomcat10 10.1.42-150200.5.45.1 SUSE-SU-2025:02261-1
SLES 15 SP6 tomcat 9.0.106-150200.86.1 SUSE-SU-2025:02280-1
SLES 15 SP6 tomcat10 10.1.42-150200.5.45.1 SUSE-SU-2025:02261-1
SLES 15 SP5 tomcat 9.0.106-150200.86.1 SUSE-SU-2025:02280-1
SLES 15 SP5 tomcat10 10.1.42-150200.5.45.1 SUSE-SU-2025:02261-1
SLES 15 SP4 tomcat 9.0.106-150200.86.1 SUSE-SU-2025:02280-1
SLES 15 SP3 tomcat 9.0.106-150200.86.1 SUSE-SU-2025:02280-1
Show 9 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES 12 SP5 tomcat 9.0.36-3.145.1 SUSE-SU-2026:1058-1, SUSE-SU-2025:02214-1
SLES for SAP 15 SP5 tomcat 9.0.106-150200.86.1 SUSE-SU-2025:02280-1
SLES for SAP 15 SP5 tomcat10 10.1.42-150200.5.45.1 SUSE-SU-2025:02261-1
SLES for SAP 15 SP4 tomcat 9.0.106-150200.86.1 SUSE-SU-2025:02280-1
SLES for SAP 15 SP3 tomcat 9.0.106-150200.86.1 SUSE-SU-2025:02280-1
SLE HPC 15 SP5 tomcat 9.0.106-150200.86.1 SUSE-SU-2025:02280-1
SLE HPC 15 SP5 tomcat10 10.1.42-150200.5.45.1 SUSE-SU-2025:02261-1
SLE HPC 15 SP4 tomcat 9.0.106-150200.86.1 SUSE-SU-2025:02280-1
SLE HPC 15 SP3 tomcat 9.0.106-150200.86.1 SUSE-SU-2025:02280-1
SUSE Manager Server 4.3 tomcat 9.0.106-150200.86.1 SUSE-SU-2025:02280-1
SUSE Enterprise Storage 7.1 tomcat 9.0.106-150200.86.1 SUSE-SU-2025:02280-1
ReleasePackageFixed inAdvisory
openSUSE Tumbleweed tomcat 9.0.106-1.1 openSUSE-SU-2025:15301-1
openSUSE Tumbleweed tomcat10 10.1.42-1.1 openSUSE-SU-2025:15302-1
openSUSE Tumbleweed tomcat11 11.0.8-1.1 openSUSE-SU-2025:15303-1
openSUSE Leap 15.6 tomcat 9.0.106-150200.86.1 SUSE-SU-2025:02280-1
openSUSE Leap 15.6 tomcat10 10.1.42-150200.5.45.1 SUSE-SU-2025:02261-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2023 tomcat10 +7 1:10.1.41-1.amzn2023.0.1 ALAS2023-2025-1031
Amazon Linux 2023 tomcat9 +7 1:9.0.105-1.amzn2023.0.1 ALAS2023-2025-1030

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 10 tomcat +7 1:10.1.49-3.el10_2 ELSA-2026-18537
Oracle Linux 10 tomcat9 +7 1:9.0.117-2.el10_2 ELSA-2026-18536
Oracle Linux 9 tomcat +7 1:9.0.117-1.el9_8 ELSA-2026-18916

Wolfi

ReleasePackageFixed inAdvisory
Wolfi rolling thingsboard +4 4.0.1-r4 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Affected packages

EcosystemPackageAffectedFixedRecord
Maven org.apache.tomcat:tomcat-catalina >= 9.0.0.M1, < 9.0.105 9.0.105 GHSA-h2fw-rfh5-95r3
Maven org.apache.tomcat:tomcat-catalina >= 10.1.0-M1, < 10.1.41 10.1.41 GHSA-h2fw-rfh5-95r3
Maven org.apache.tomcat:tomcat-catalina >= 11.0.0-M1, < 11.0.7 11.0.7 GHSA-h2fw-rfh5-95r3
Maven org.apache.tomcat:tomcat-catalina >= 8.5.0, <= 8.5.100 — GHSA-h2fw-rfh5-95r3
Maven org.apache.tomcat.embed:tomcat-embed-core >= 9.0.0.M1, < 9.0.105 9.0.105 GHSA-h2fw-rfh5-95r3
Maven org.apache.tomcat.embed:tomcat-embed-core >= 10.1.0-M1, < 10.1.41 10.1.41 GHSA-h2fw-rfh5-95r3
Maven org.apache.tomcat.embed:tomcat-embed-core >= 11.0.0-M1, < 11.0.7 11.0.7 GHSA-h2fw-rfh5-95r3
Maven org.apache.tomcat.embed:tomcat-embed-core >= 8.5.0, <= 8.5.100 — GHSA-h2fw-rfh5-95r3

Advisories 31

References