CVE-2026-34483

CVE-2026-34483: Apache Tomcat: Incomplete escaping of JSON access logs

Vendor Apache Software Foundation
Product Apache Tomcat
Weakness CWE-116
Published April 9, 2026
Last update April 10, 2026

CVSS base score

What the vulnerability does

Description

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.

Key dates

Disclosure timeline

April 9, 2026 CVE published
April 10, 2026 Record updated