Apache Log4j Layout Template Json
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By the Year
In 2026 there have been 1 vulnerability in Apache Log4j Layout Template Json.
| Year | Vulnerabilities | Average Score |
|---|---|---|
| 2026 | 1 | 0.00 |
It may take a day or so for new Log4j Layout Template Json vulnerabilities to show up in the stats or in the list of recent security vulnerabilities. Additionally vulnerabilities may be tagged under a different product or component name.
Recent Apache Log4j Layout Template Json Security Vulnerabilities
Apache Log4j JsonTemplateLayout 2.x: Nonfinite float JSON error (2.25.4)
CVE-2026-34481
- April 10, 2026
Apache Log4j's JsonTemplateLayout https://logging.apache.org/log4j/2.x/manual/json-template-layout.html , in versions up to and including 2.25.3, produces invalid JSON output when log events contain non-finite floating-point values (NaN, Infinity, or -Infinity), which are prohibited by RFC 8259. This may cause downstream log processing systems to reject or fail to index affected records. An attacker can exploit this issue only if both of the following conditions are met: * The application uses JsonTemplateLayout. * The application logs a MapMessage containing an attacker-controlled floating-point value. Users are advised to upgrade to Apache Log4j JSON Template Layout 2.25.4, which corrects this issue.
Output Sanitization
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