High [CVE-2026-34483] Apache Tomcat: Improper Encoding or Escaping of Output vulnerability in the JsonAccessLogValve component of Apache Tomcat.
This high-severity Apache Software Foundation advisory covers CVE-2026-34483 affecting Apache Tomcat, Tomcat.
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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.
- 11.0.0-M1 through 11.0.20
- 10.1.0-M1 through 10.1.53
- 9.0.40 through 9.0.116.
- through 9.0.116
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- 11.0.21
- 10.1.54
- 9.0.117
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation
Upgrade to a fixed release: 11.0.21, 10.1.54, 9.0.117. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Discussion(0)
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