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CVE-2026-65182: Apache Tomcat has an Improper Access Control, Incorrect Authorization vulnerability

August 26, 2026 (updated September 2, 2026)

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.

References

  • github.com/advisories/GHSA-gcx9-497g-6cp6
  • github.com/apache/tomcat/commit/8bafd79a3b54684e80e9cb1bafd4746aede7d3f5
  • github.com/apache/tomcat/commit/b2c56ec8f20c66773a1a813034ffcdb60841f1cf
  • github.com/apache/tomcat/commit/b79752d2a8578d94743e2a95c50af297f780c0df
  • lists.apache.org/thread/joosxvzc9b49ttj8lj0jw9mqt0ml767m
  • nvd.nist.gov/vuln/detail/CVE-2026-65182
  • tomcat.apache.org/security-10.html
  • tomcat.apache.org/security-11.html
  • tomcat.apache.org/security-9.html

Code Behaviors & Features

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Affected versions

All versions starting from 7.0.0 up to 7.0.109, all versions starting from 8.5.0 up to 8.5.100, all versions starting from 9.0.0-M1 before 9.0.121, all versions starting from 10.1.0-M1 before 10.1.58, all versions starting from 11.0.0-M1 before 11.0.25

Fixed versions

  • 9.0.121
  • 10.1.58
  • 11.0.25

Solution

Upgrade to versions 9.0.121, 10.1.58, 11.0.25 or above.

Impact 9.1 CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Learn more about CVSS

Weakness

  • CWE-284: Improper Access Control

Source file

maven/org.apache.tomcat/tomcat/CVE-2026-65182.yml

Spotted a mistake? Edit the file on GitLab.

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