Critical severity9.1NVD Advisory· Published Jul 14, 2026· Updated Jul 14, 2026
CVE-2026-59083
CVE-2026-59083
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
10- osv-coords7 versionspkg:bitnami/tomcatpkg:rpm/opensuse/tomcat&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/tomcat&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/tomcat10&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/tomcat10&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/tomcat11&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/tomcat11&distro=openSUSE%20Tumbleweed
< 9.0.120+ 6 more
- (no CPE)range: < 9.0.120
- (no CPE)range: < 9.0.120-160000.1.1
- (no CPE)range: < 9.0.120-1.1
- (no CPE)range: < 10.1.57-160000.1.1
- (no CPE)range: < 10.1.57-1.1
- (no CPE)range: < 11.0.24-160000.1.1
- (no CPE)range: < 11.0.24-1.1
Patches
Vulnerability mechanics
References
2- www.openwall.com/lists/oss-security/2026/07/14/7nvdMailing ListThird Party Advisory
- lists.apache.org/thread/3g63zos2gkjo5vgnrk8kxmosv47w6wbqnvdMitigationVendor Advisory
News mentions
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