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CVE-2026-34480 Apache Log4j Core: Silent log event loss in XmlLayout due to unescaped XML 1.0 forbidden characters

🗓️ 10 Apr 2026 15:42:03Reported by apacheType 
cvelist
 cvelist🔗 www.cve.org👁 28 Views

Log4j Core XmlLayout fails to sanitize XML 1.0 forbidden chars, causing log loss; upgrade 2.25.4.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
IBM Security Bulletins		Security Bulletin: There is a vulnerability in log4j-core-2.25.3.jar used by IBM Maximo Manage application in IBM Maximo Application Suite (CVE-2026-34477, CVE-2026-34478, CVE-2026-34480)
29 May 202609:54
–ibm
IBM Security Bulletins		Security Bulletin: Multiple Vulnerabilities in Apache Log4j Core shipped in Tivoli Netcool/OMNIbus
29 May 202612:15
–ibm
IBM Security Bulletins		Security Bulletin: There is a vulnerability in log4j-core-2.25.3.jar used by IBM Maximo Manage application in IBM Maximo Application Suite (CVE-2026-34477, CVE-2026-34478, CVE-2026-34480)
29 May 202609:56
–ibm
IBM Security Bulletins		Security Bulletin: Due to use of log4j-core-2.25.3.jar, IBM Sterling Connect:Direct Web Services is vulnerable to log injection via CRLF sequences.
3 Jun 202604:27
–ibm
IBM Security Bulletins		Security Bulletin: There is a vulnerability in log4j-core-2.25.3.jar used by IBM Maximo Manage application in IBM Maximo Application Suite (CVE-2026-34480 ,CVE-2026-34477, CVE-2026-34478, CVE-2026-34479)
29 May 202608:56
–ibm
IBM Security Bulletins		Security Bulletin: Multiple Vulnerabilities in watsonx.data
9 May 202608:59
–ibm
IBM Security Bulletins		Security Bulletin: IBM SPSS Modeler is affected by multiple vulnerabilities in Apache Log4j
27 May 202617:36
–ibm
IBM Security Bulletins		Security Bulletin: The Apache Log4J 2 package that is shipped with IBM ApplinX is vulnerable to multiple vulnerabilities (CVE-2026-34480, CVE-2026-34477, CVE-2026-34478, CVE-2026-34479).
11 Jun 202621:17
–ibm
IBM Security Bulletins		Security Bulletin: IBM App Connect for Manufacturing is vulnerable to multiple vulnerabilities due to Apache Log4j and Bouncy Castle.
11 May 202606:59
–ibm
IBM Security Bulletins		Security Bulletin: IBM App Connect for Healthcare is vulnerable to multiple vulnerabilities due to Apache Log4j and Apache Neethi
8 Jun 202611:43
–ibm
Rows per page
[
  {
    "collectionURL": "https://repo.maven.apache.org/maven2",
    "cpes": [
      "cpe:2.3:a:apache:log4j:*:*:*:*:*:*:*:*"
    ],
    "defaultStatus": "unaffected",
    "packageName": "org.apache.logging.log4j:log4j-core",
    "packageURL": "pkg:maven/org.apache.logging.log4j/log4j-core",
    "product": "Apache Log4j Core",
    "vendor": "Apache Software Foundation",
    "versions": [
      {
        "lessThan": "2.25.4",
        "status": "affected",
        "version": "2.0-alpha1",
        "versionType": "maven"
      },
      {
        "lessThanOrEqual": "3.0.0-beta3",
        "status": "affected",
        "version": "3.0.0-alpha1",
        "versionType": "maven"
      }
    ]
  }
]

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10 Apr 2026 15:42Current
CVSS 46.9
EPSS0.00034
CWE-116
log4j corexml layoutforbidden characterssilent log lossversion 2.25.3upgrade 2.25.4
28