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CVE-2026-34483GHSA-RV64-5GF8-9QQ8BIT-TOMCAT-2026-34483

Apache Tomcat: Incomplete escaping of JSON access logs

Published
Last modified
published
Not listed in CISA KEV
Low (apache)
Fix
Fixed in 9.0.116, 10.1.54, 11.0.21
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: yes
  • Technical impact: partial

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: yes · Technical impact: partial

  3. Record last updated

Affected versions

  • Apache Software Foundation 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; From 8.5.84 · through 8.5.100

  • org.apache.tomcat:tomcat-catalinaMaven

    From 9.0.40 · fixed in 9.0.116

  • org.apache.tomcat:tomcat-catalinaMaven

    From 10.1.0-M1 · fixed in 10.1.54

  • org.apache.tomcat:tomcat-catalinaMaven

    From 11.0.0-M1 · fixed in 11.0.21

  • org.apache.tomcat:tomcatMaven

    From 9.0.40 · fixed in 9.0.116

  • org.apache.tomcat:tomcatMaven

    From 10.1.0-M1 · fixed in 10.1.54

  • org.apache.tomcat:tomcatMaven

    From 11.0.0-M1 · fixed in 11.0.21

  • org.apache.tomcat.embed:tomcat-embed-coreMaven

    From 9.0.40 · fixed in 9.0.116

  • org.apache.tomcat.embed:tomcat-embed-coreMaven

    From 10.1.0-M1 · fixed in 10.1.54

  • org.apache.tomcat.embed:tomcat-embed-coreMaven

    From 11.0.0-M1 · fixed in 11.0.21

References 1

lists.apache.org