GitHub Advisoryadvisory · Maven

GHSA-rv64-5gf8-9qq8 Apache Tomcat has an Improper Encoding or Escaping of Output vulnerability in the JsonAccessLogValve

HIGH Published 2026-04-09 Modified 2026-04-10 Official page ↗
Aliases
CVE-2026-34483
Ecosystem
Maven
Packages
org.apache.tomcat:tomcat-catalina, org.apache.tomcat:tomcat, org.apache.tomcat.embed:tomcat-embed-core
Severity
High
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weaknesses
CWE-116
Reviewed
2026-04-10

Affected packages

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

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.

Related

Alias · CVE (1)

  • CVE-2026-34483 Improper Encoding or Escaping of Output vulnerability in the JsonAccessLogValve component of Apache Tomcat. vulnerability

Weakness · CWE (1)

  • CWE-116 Improper Encoding or Escaping of Output weakness

References