Improper Encoding or Escaping of Output vulnerability in the JsonAccessLogValve component of Apache Tomcat.

Code

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No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Apr 9, 2026 · NIST NVD

   Detected

   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.

2. Jun 17, 2026 · NIST NVD

   Updated

   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.

Affected

• cpe apache/tomcatversion unspecified

Sources

• CVE.orgVulnerability recordCVE-2026-34483

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-2026-34483

  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

  nvd.nist.gov

References

• Mailing List · openwall.com
• Mailing List · lists.apache.org