vulnerability
Apache Tomcat: Low: Incomplete escaping of JSON access logs (CVE-2026-34483)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 8 | (AV:N/AC:L/Au:N/C:C/I:N/A:N) | Apr 10, 2026 | Apr 10, 2026 | Apr 13, 2026 |
Severity
8
CVSS
(AV:N/AC:L/Au:N/C:C/I:N/A:N)
Published
Apr 10, 2026
Added
Apr 10, 2026
Modified
Apr 13, 2026
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.
Solutions
apache-tomcat-upgrade-10_1_54apache-tomcat-upgrade-11_0_21apache-tomcat-upgrade-9_0_117
Rapid7 Labs
2026 Global Threat Landscape Report
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