Vulnerability · Published Aug 25, 2026 · Assigned by apache
CVE-2026-65182Apache Tomcat: Bypass longest prefix security constraint
Critical 9.1
In plain English
A critical-severity improper access control in Apache Tomcat from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 52% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Improper Access Control, Incorrect Authorization vulnerability in Apache Tomcat leads to security constraint bypass if a constraint for a longer path is specified before a more restrictive constraint for a shorter sub-path. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Users are recommended to upgrade to version 11.0.25, 10.1.58, 9.0.121, which fixes the issue.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | tomcat | 1:9.0.121-1.el8_10 | ALSA-2026:92869 |
| AlmaLinux:9 | tomcat | 1:9.0.121-1.el9_8 | ALSA-2026:93469 |
| AlmaLinux:8 | tomcat-admin-webapps | 1:9.0.121-1.el8_10 | ALSA-2026:92869 |
| AlmaLinux:9 | tomcat-admin-webapps | 1:9.0.121-1.el9_8 | ALSA-2026:93469 |
| AlmaLinux:8 | tomcat-docs-webapp | 1:9.0.121-1.el8_10 | ALSA-2026:92869 |
| AlmaLinux:9 | tomcat-docs-webapp | 1:9.0.121-1.el9_8 | ALSA-2026:93469 |
| AlmaLinux:8 | tomcat-el-3.0-api | 1:9.0.121-1.el8_10 | ALSA-2026:92869 |
| AlmaLinux:9 | tomcat-el-3.0-api | 1:9.0.121-1.el9_8 | ALSA-2026:93469 |
| AlmaLinux:8 | tomcat-jsp-2.3-api | 1:9.0.121-1.el8_10 | ALSA-2026:92869 |
| AlmaLinux:9 | tomcat-jsp-2.3-api | 1:9.0.121-1.el9_8 | ALSA-2026:93469 |
| AlmaLinux:8 | tomcat-lib | 1:9.0.121-1.el8_10 | ALSA-2026:92869 |
| AlmaLinux:9 | tomcat-lib | 1:9.0.121-1.el9_8 | ALSA-2026:93469 |
| AlmaLinux:8 | tomcat-servlet-4.0-api | 1:9.0.121-1.el8_10 | ALSA-2026:92869 |
| AlmaLinux:9 | tomcat-servlet-4.0-api | 1:9.0.121-1.el9_8 | ALSA-2026:93469 |
| AlmaLinux:8 | tomcat-webapps | 1:9.0.121-1.el8_10 | ALSA-2026:92869 |
| AlmaLinux:9 | tomcat-webapps | 1:9.0.121-1.el9_8 | ALSA-2026:93469 |
| Debian:12 | tomcat10 | no fix listed | DEBIAN-CVE-2026-65182 |
| Debian:13 | tomcat10 | no fix listed | DEBIAN-CVE-2026-65182 |
| Debian:14 | tomcat10 | 10.1.60-1 | DEBIAN-CVE-2026-65182 |
| Debian:13 | tomcat11 | no fix listed | DEBIAN-CVE-2026-65182 |
| Debian:14 | tomcat11 | no fix listed | DEBIAN-CVE-2026-65182 |
| Debian:12 | tomcat9 | 9.0.70-2 | DEBIAN-CVE-2026-65182 |
| Debian:13 | tomcat9 | 9.0.70-2 | DEBIAN-CVE-2026-65182 |
| Debian:14 | tomcat9 | 9.0.70-2 | DEBIAN-CVE-2026-65182 |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | no fix listed | GHSA-gcx9-497g-6cp6 |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | no fix listed | GHSA-gcx9-497g-6cp6 |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | 11.0.25 | GHSA-gcx9-497g-6cp6 |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | 10.1.58 | GHSA-gcx9-497g-6cp6 |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | 9.0.121 | GHSA-gcx9-497g-6cp6 |
| Maven | org.apache.tomcat:tomcat | no fix listed | GHSA-gcx9-497g-6cp6 |
| Maven | org.apache.tomcat:tomcat | no fix listed | GHSA-gcx9-497g-6cp6 |
| Maven | org.apache.tomcat:tomcat | 11.0.25 | GHSA-gcx9-497g-6cp6 |
| Maven | org.apache.tomcat:tomcat | 10.1.58 | GHSA-gcx9-497g-6cp6 |
| Maven | org.apache.tomcat:tomcat | 9.0.121 | GHSA-gcx9-497g-6cp6 |
| Maven | org.apache.tomcat:tomcat-catalina | no fix listed | GHSA-gcx9-497g-6cp6 |
| Maven | org.apache.tomcat:tomcat-catalina | no fix listed | GHSA-gcx9-497g-6cp6 |
| Maven | org.apache.tomcat:tomcat-catalina | 11.0.25 | GHSA-gcx9-497g-6cp6 |
| Maven | org.apache.tomcat:tomcat-catalina | 10.1.58 | GHSA-gcx9-497g-6cp6 |
| Maven | org.apache.tomcat:tomcat-catalina | 9.0.121 | GHSA-gcx9-497g-6cp6 |
| Rocky Linux:8 | tomcat | 1:9.0.121-1.el8_10 | RLSA-2026:92869 |
| Rocky Linux:9 | tomcat | 1:9.0.121-1.el9_8 | RLSA-2026:93469 |
| Ubuntu:24.04:LTS | tomcat10 | no fix listed | UBUNTU-CVE-2026-65182 |
| Ubuntu:26.04:LTS | tomcat10 | no fix listed | UBUNTU-CVE-2026-65182 |
| Ubuntu:26.10 | tomcat10 | no fix listed | UBUNTU-CVE-2026-65182 |
| Ubuntu:26.04:LTS | tomcat11 | no fix listed | UBUNTU-CVE-2026-65182 |
| Ubuntu:26.10 | tomcat11 | no fix listed | UBUNTU-CVE-2026-65182 |
| Ubuntu:24.04:LTS | tomcat9 | no fix listed | UBUNTU-CVE-2026-65182 |
| Ubuntu:26.04:LTS | tomcat9 | no fix listed | UBUNTU-CVE-2026-65182 |
| Ubuntu:26.10 | tomcat9 | no fix listed | UBUNTU-CVE-2026-65182 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Apache Software Foundation | Apache Tomcat | 11.0.0-M1 – through 11.0.2410.1.0-M1 – through 10.1.579.0.0.M1 – through 9.0.1208.5.0 – through 8.5.1007.0.0 – through 7.0.109 |
Weakness: CWE-284, CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N