CVE-2026-59083

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 v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://lists.apache.org/thread/3g63zos2gkjo5vgnrk8kxmosv47w6wbq	Mitigation Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/07/14/7	Mailing List Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:apache:tomcat::::::::
	cpe:2.3:a:apache:tomcat::::::::
	cpe:2.3:a:apache:tomcat::::::::
	cpe:2.3:a:apache:tomcat::::::::
	cpe:2.3:a:apache:tomcat::::::::

History

14 Jul 2026, 16:57

Type	Values Removed	Values Added
First Time		Apache tomcat Apache
References	~~() https://lists.apache.org/thread/3g63zos2gkjo5vgnrk8kxmosv47w6wbq -~~	() https://lists.apache.org/thread/3g63zos2gkjo5vgnrk8kxmosv47w6wbq - Mitigation, Vendor Advisory
References	~~() http://www.openwall.com/lists/oss-security/2026/07/14/7 -~~	() http://www.openwall.com/lists/oss-security/2026/07/14/7 - Mailing List, Third Party Advisory
CPE		cpe:2.3:a:apache:tomcat::::::::

14 Jul 2026, 13:19

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 9.1

14 Jul 2026, 11:16

Type	Values Removed	Values Added
References		() http://www.openwall.com/lists/oss-security/2026/07/14/7 -

14 Jul 2026, 09:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-14 09:16

Updated : 2026-07-14 16:57

NVD link : CVE-2026-59083

Mitre link : CVE-2026-59083

CVE.ORG link : CVE-2026-59083

JSON object : View

Products Affected

apache

tomcat

CWE

CWE-177

Improper Handling of URL Encoding (Hex Encoding)

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