Improper Encoding or Escaping of Output Affecting kafka-bridge-fips package, versions <1.0.0-r1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.69% (53rd percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-KAFKABRIDGEFIPS-17056064
  • published29 May 2026
  • disclosed10 Apr 2026

Introduced: 10 Apr 2026

CVE-2026-34481  (opens in a new tab)
CWE-116  (opens in a new tab)

How to fix?

Upgrade Chainguard kafka-bridge-fips to version 1.0.0-r1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kafka-bridge-fips package and not the kafka-bridge-fips package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

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, or logs an object directly (e.g., via Logger.info(Object), which wraps it in an ObjectMessage), where the message contains an attacker-controlled floating-point value.

Users are advised to upgrade to Apache Log4j JSON Template Layout 2.25.4, which corrects this issue.

Note: The fix released in version 2.25.4 did not cover all affected code paths. CVE-2026-49844 was assigned to the remaining issue, which concerns the MapMessage.asJson() serialization in Apache Log4j API and is fixed in versions 2.25.5 and 2.26.1.

CVSS Base Scores

version 3.1