CVE-2026-34483: CWE-116 Improper Encoding or Escaping of Output in Apache Software Foundation Apache Tomcat
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.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-34483) concerns improper encoding or escaping of output (CWE-116) in the JsonAccessLogValve component of Apache Tomcat. It affects multiple versions across the 9.x, 10.x, and 11.x branches. The improper encoding or escaping could lead to potential security issues related to output handling. The Apache Software Foundation has fixed the issue in Apache Tomcat versions 11.0.21, 10.1.54, and 9.0.117. No cloud service is involved, and no known exploits have been reported.
Potential Impact
The vulnerability could allow improper handling of output data in the JsonAccessLogValve component, which may lead to security risks depending on how the output is consumed or displayed. However, no specific exploitation details or impacts are documented, and no known exploits exist in the wild at this time.
Mitigation Recommendations
Users are advised to upgrade affected Apache Tomcat installations to versions 11.0.21, 10.1.54, or 9.0.117 where the vulnerability is fixed. No other mitigation or temporary fixes are indicated. Patch status is confirmed by the vendor advisory recommending these version upgrades.
CVE-2026-34483: CWE-116 Improper Encoding or Escaping of Output in Apache Software Foundation Apache Tomcat
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-34483) concerns improper encoding or escaping of output (CWE-116) in the JsonAccessLogValve component of Apache Tomcat. It affects multiple versions across the 9.x, 10.x, and 11.x branches. The improper encoding or escaping could lead to potential security issues related to output handling. The Apache Software Foundation has fixed the issue in Apache Tomcat versions 11.0.21, 10.1.54, and 9.0.117. No cloud service is involved, and no known exploits have been reported.
Potential Impact
The vulnerability could allow improper handling of output data in the JsonAccessLogValve component, which may lead to security risks depending on how the output is consumed or displayed. However, no specific exploitation details or impacts are documented, and no known exploits exist in the wild at this time.
Mitigation Recommendations
Users are advised to upgrade affected Apache Tomcat installations to versions 11.0.21, 10.1.54, or 9.0.117 where the vulnerability is fixed. No other mitigation or temporary fixes are indicated. Patch status is confirmed by the vendor advisory recommending these version upgrades.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-03-30T07:40:44.705Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d806d21cc7ad14da15a55c
Added to database: 4/9/2026, 8:06:42 PM
Last enriched: 4/9/2026, 8:21:54 PM
Last updated: 4/10/2026, 8:15:17 AM
Views: 18
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