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CVE-2026-34481 Apache Log4j JSON Template Layout: Improper serialization of non-finite floating-point values in JsonTemplateLayout

🗓️ 10 Apr 2026 15:43:00Reported by apacheType 
cvelist
 cvelist
🔗 www.cve.org👁 31 Views

Log4j JSON Template Layout up to 2.25.3 can emit invalid JSON for non-finite floats; upgrade to 2.25.4.

Related
Affected
Refs
[
  {
    "collectionURL": "https://repo.maven.apache.org/maven2",
    "cpes": [
      "cpe:2.3:a:apache:log4j_layout_template_json:*:*:*:*:*:*:*:*"
    ],
    "defaultStatus": "unaffected",
    "packageName": "org.apache.logging.log4j:log4j-layout-template-json",
    "packageURL": "pkg:maven/org.apache.logging.log4j/log4j-layout-template-json",
    "product": "Apache Log4j JSON Template Layout",
    "vendor": "Apache Software Foundation",
    "versions": [
      {
        "lessThan": "2.25.4",
        "status": "affected",
        "version": "2.14.0",
        "versionType": "maven"
      },
      {
        "lessThanOrEqual": "3.0.0-beta3",
        "status": "affected",
        "version": "3.0.0-alpha1",
        "versionType": "maven"
      }
    ]
  }
]

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