OESA-2026-3153 log4j security update

Log4j is a tool to help the programmer output log statements to a variety of output targets. Security Fixes: Apache Log4j's JsonTemplateLayout 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,...

Apache Log4j 2.13.1 < 2.25.5 / 2.26.0 < 2.26.1 Improper JSON Serialization (CVE-2026-49844)

The version of Apache Log4j on the remote host is affected by a vulnerability: - Improper encoding of non-finite floating-point values during MapMessage JSON serialization in Apache Log4j API produces output that is not valid JSON. When a MapMessage contains a non-finite IEEE 754 value NaN,...

EUVD-2026-43102

Improper encoding of non-finite floating-point values during MapMessage JSON serialization in Apache Log4j API produces output that is not valid JSON. This issue affects Apache Log4j API versions 2.13.1 through 2.25.4 and version 2.26.0. The fix for CVE-2026-34481 did not cover all code paths: wh...

Improper Encoding or Escaping of Output

Overview Affected versions of this package are vulnerable to Improper Encoding or Escaping of Output in the MapMessage.asJson method, which emits the bare NaN, Infinity, or -Infinity tokens instead of an RFC 8259-compliant representation. An attacker can emit malformed JSON that corrupts the...

CVE-2026-49844

Improper encoding of non-finite floating-point values during MapMessage JSON serialization in Apache Log4j API produces output that is not valid JSON. This issue affects Apache Log4j API versions 2.13.1 through 2.25.4 and version 2.26.0. The fix for CVE-2026-34481 did not cover all code paths: wh...

DEBIAN-CVE-2026-49844

Improper encoding of non-finite floating-point values during MapMessage JSON serialization in Apache Log4j API produces output that is not valid JSON. This issue affects Apache Log4j API versions 2.13.1 through 2.25.4 and version 2.26.0. The fix for CVE-2026-34481 did not cover all code paths: wh...

CVE-2026-49844

CVE-2026-49844 describes an issue in the Apache Log4j API where MapMessage.asJson() can emit non-finite IEEE 754 values (NaN, Infinity, -Infinity) as bare tokens during JSON serialization. This affects Log4j API versions 2.13.1–2.25.4 and 2.26.0. The fault occurs when a MapMessage contains an att...

CVE-2026-49844

Improper encoding of non-finite floating-point values during MapMessage JSON serialization in Apache Log4j API produces output that is not valid JSON. This issue affects Apache Log4j API versions 2.13.1 through 2.25.4 and version 2.26.0. The fix for CVE-2026-34481 did not cover all code paths: wh...

PT-2026-57319

Name of the Vulnerable Software and Affected Versions Apache Log4j API versions 2.13.1 through 2.25.4 Apache Log4j API version 2.26.0 Description Improper encoding of non-finite IEEE 754 floating-point values NaN, Infinity, or -Infinity during MapMessage JSON serialization produces output that is...

Improper Encoding or Escaping of Output

Overview Affected versions of this package are vulnerable to Improper Encoding or Escaping of Output when JsonTemplateLayout logs a MapMessage. An attacker can cause downstream log processing systems to reject or fail to index affected records by supplying non-finite floating-point values such as...