CVE-2026-59083

critical · 9.1

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.

9.1

CVSS

0.4%

EPSS (exploit prob.)

31st

EPSS percentile

2026-07-14

Published

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Weaknesses

CWE-177

Affected products

Vendor	Product	Affected versions
apache	tomcat	<= 8.0.0
apache	tomcat	>= 8.5.0, <= 8.5.100
apache	tomcat	>= 9.0.0, <= 9.0.119
apache	tomcat	>= 10.1.0, <= 10.1.56
apache	tomcat	>= 11.0.0, <= 11.0.23

Check a specific version with /api/v1/cve/match.

References

https://lists.apache.org/thread/3g63zos2gkjo5vgnrk8kxmosv47w6wbq
http://www.openwall.com/lists/oss-security/2026/07/14/7

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-59083