CVE-2026-34483

Improper Encoding or Escaping of Output vulnerability in the JsonAccessLogValve component of Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.20, from 10.1.0-M1 through 10.1.53, from 9.0.40 through 9.0.116. Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117 , which fix the issue.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://lists.apache.org/thread/j1w7304yonlr8vo1tkb5nfs7od1y228b	Mailing List Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/04/09/26	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::::::::

History

No history.

Information

Published : 2026-04-09 20:16

Updated : 2026-06-17 10:39

NVD link : CVE-2026-34483

Mitre link : CVE-2026-34483

CVE.ORG link : CVE-2026-34483

JSON object : View

Products Affected

apache

tomcat

CWE

CWE-116

Improper Encoding or Escaping of Output

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