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GHSA-rv64-5gf8-9qq8

Apache Tomcat has an Improper Encoding or Escaping of Output vulnerability in the JsonAccessLogValve

Source: GitHub Advisory Database (reviewed) High CVE-2026-34483

Packages

EcosystemPackageAffectedFixed in
Maven org.apache.tomcat:tomcat-catalina >= 9.0.40, < 9.0.116 9.0.116
Maven org.apache.tomcat:tomcat-catalina >= 10.1.0-M1, < 10.1.54 10.1.54
Maven org.apache.tomcat:tomcat-catalina >= 11.0.0-M1, < 11.0.21 11.0.21
Maven org.apache.tomcat:tomcat >= 9.0.40, < 9.0.116 9.0.116
Maven org.apache.tomcat:tomcat >= 10.1.0-M1, < 10.1.54 10.1.54
Maven org.apache.tomcat:tomcat >= 11.0.0-M1, < 11.0.21 11.0.21
Maven org.apache.tomcat.embed:tomcat-embed-core >= 9.0.40, < 9.0.116 9.0.116
Maven org.apache.tomcat.embed:tomcat-embed-core >= 10.1.0-M1, < 10.1.54 10.1.54
Maven org.apache.tomcat.embed:tomcat-embed-core >= 11.0.0-M1, < 11.0.21 11.0.21

Details

As written in the advisory (Markdown source, shown as plain text).

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.

References

External links from the advisory. They lead to third-party sites.