CVE-2026-59083

Published: Jul 14, 2026Modified: Jul 14, 2026

9.1

Vector

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

Exploitability: 3.9 / Impact: 5.2

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Description

Improper Handling of URL Encoding (Hex Encoding) vulnerability in Apache Tomcat's rewrite valve allowed security constraint bypass for some configurations. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.23, from 10.1.0-M1 through 10.1.56, from 9.0.0.M1 through 9.0.119, 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 11.0.24, 10.1.57 or 9.0.120, which fix the issue.

Affected (5)

Products: Apache: Tomcat

Apache

1 product

Tomcat

Configuration A

5 vulnerable

Vulnerable Software	Affected Versions
Apache Tomcat	Up to 8.0.0
Apache Tomcat	From 10.1.0 to 10.1.56
Apache Tomcat	From 11.0.0 to 11.0.23
Apache Tomcat	From 8.5.0 to 8.5.100
Apache Tomcat	From 9.0.0 to 9.0.119

Related CWEs

CWE-177

Improper Handling of URL Encoding (Hex Encoding)

The product does not properly handle when all or part of an input has been URL encoded.

References (2)

https://lists.apache.org/thread/3g63zos2gkjo5vgnrk8kxmosv47w6wbq

Source: security@apache.org

MitigationVendor Advisory

http://www.openwall.com/lists/oss-security/2026/07/14/7

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing ListThird Party Advisory

Timeline

No history available yet.