Description
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.
INFO
Published Date :
2026-04-10T15:43:00.100Z
Last Modified :
2026-04-10T17:41:38.229Z
Source :
apache
AFFECTED PRODUCTS
The following products are affected by CVE-2026-34481 vulnerability.
| Vendors | Products |
|---|---|
| Apache |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-34481.
