CVE-2026-59083

CRITICAL9.1

Apache Tomcat: Incorrect URL decoding in RewriteValve may allow security control bypass

Published Jul 14, 2026

Modified 1 weeks ago

Details

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 Packages

tomcat

fedora 42

References

WEB

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

ADVISORY

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

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-59083

CVSS Analysis