CVE-2026-59083 Details
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.
A vulnerability in Apache Tomcat's rewrite valve has been identified, allowing for security constraint bypass in certain configurations. This issue arises from improper handling of URL encoding, specifically hex encoding, which can lead to incorrect decoding of spaces in rewritten URIs. The vulnerability affects Apache Tomcat versions 11.0.0-M1 prior to 11.0.23, 10.1.0-M1 prior to 10.1.56, 9.0.0-M1 prior to 9.0.119, and 8.5.0 prior to 8.5.100. Additionally, other unsupported versions may also be affected.
Users are advised to upgrade to Apache Tomcat versions 11.0.24, 10.1.57, or 9.0.120.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jul 14, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2026/07/14/7 | CVE | Mailing ListThird Party Advisory |
| https://lists.apache.org/thread/3g63zos2gkjo5vgnrk8kxmosv47w6wbq | [email protected] | MitigationVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-177 | Improper Handling of URL Encoding (Hex Encoding) | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| apache tomcat | <= 8.0.0 >= 8.5.0, <= 8.5.100 >= 9.0.0, <= 9.0.119 >= 10.1.0, <= 10.1.56 >= 11.0.0, <= 11.0.23 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 14, 2026 | Initial Analysis | [email protected] |
| Jul 14, 2026 | CVE Modified | CISA-ADP |
| Jul 14, 2026 | CVE Modified | CVE |
| Jul 14, 2026 | New CVE Received | [email protected] |