CVE-2026-59083 | Improper Handling of URL Encoding (Hex Encoding) vulnerabili…

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.

Metadata

CVE ID: CVE-2026-59083
State: PUBLISHED
Assigner: apache
Reserved: 2026-07-02 10:39 UTC
Published: 2026-07-14 08:13 UTC
Last updated: 2026-07-14 10:33 UTC
Primary CWE: CWE-177
CWE-177 Improper Handling of URL Encoding (Hex Encoding)
Vendor / Product: Apache Software Foundation / Apache Tomcat
Sources: cve.org · NVD

Severity & Metrics

No CVSS data available.

Affected products (1)

Vendor	Product	Platform	Versions
Apache Software Foundation	Apache Tomcat	—	11.0.0-M1 ≤ 11.0.23, 10.1.0-M1 ≤ 10.1.56, 9.0.0.M1 ≤ 9.0.119, 8.5.0 ≤ 8.5.100 …

Weakness (CWE)

CWE	Source	Description
CWE-177	cna	CWE-177 Improper Handling of URL Encoding (Hex Encoding)

References (1)

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