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CVE-2026-59083 Improper Handling of URL Encoding (Hex Encoding) vulnerability in Apache Tomcat's rewrite valve allowed security…
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 products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Apache Tomcat 11.0 | 11.0.0-M1 → 11.0.23 | No fix stated |
| Apache Tomcat 10.1 | 10.1.0-M1 → 10.1.56 | No fix stated |
| Apache Tomcat 9.0 | 9.0.0.M1 → 9.0.119 | No fix stated |
| Apache Tomcat 8.5 | 8.5.0 → 8.5.100 | No fix stated |
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