Improper Handling of URL Encoding (Hex Encoding) Affecting tomcat-lib package, versions <1:9.0.120-2.el9_8


Severity

Recommended
medium

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.37% (29th percentile)

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  • Snyk IDSNYK-ROCKY9-TOMCATLIB-19958412
  • published20 Sept 2026
  • disclosed14 Jul 2026

Introduced: 14 Jul 2026

CVE-2026-59083  (opens in a new tab)
CWE-177  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:9 tomcat-lib to version 1:9.0.120-2.el9_8 or higher.
This issue was patched in RLSA-2026:68660.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tomcat-lib package and not the tomcat-lib package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:9 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1