{
  "document": {
    "aggregate_severity": {
      "text": "High"
    },
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "TuxCare License Agreement",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://tuxcare.com/contact/",
      "name": "TuxCare",
      "namespace": "https://tuxcare.com/"
    },
    "references": [
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.tuxcare.com/csaf/v2/els_os/tuxcare9.6esu/vex/2026/cve-2026-34480-els_os-tuxcare9_6esu.json"
      }
    ],
    "tracking": {
      "current_release_date": "2026-06-13T02:47:00Z",
      "generator": {
        "date": "2026-06-13T02:47:00Z",
        "engine": {
          "name": "pyCSAF"
        }
      },
      "id": "CVE-2026-34480-ELS_OS-TUXCARE9.6ESU",
      "initial_release_date": "2026-04-10T16:16:00Z",
      "revision_history": [
        {
          "date": "2026-04-10T16:16:00Z",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-06-13T02:47:00Z",
          "number": "2",
          "summary": "Official Publication"
        }
      ],
      "status": "final",
      "version": "2"
    },
    "title": "Security update on CVE-2026-34480"
  },
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      },
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        "relates_to_product_reference": "Rocky Linux-9.6"
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  "vulnerabilities": [
    {
      "cve": "CVE-2026-34480",
      "cwe": {
        "id": "CWE-116",
        "name": "Improper Encoding or Escaping of Output"
      },
      "notes": [
        {
          "category": "description",
          "text": "Apache Log4j Core's  XmlLayout https://logging.apache.org/log4j/2.x/manual/layouts.html#XmlLayout , in versions up to and including 2.25.3, fails to sanitize characters forbidden by the  XML 1.0 specification https://www.w3.org/TR/xml/#charsets  producing invalid XML output whenever a log message or MDC value contains such characters.\n\nThe impact depends on the StAX implementation in use:\n\n  *  JRE built-in StAX: Forbidden characters are silently written to the output, producing malformed XML. Conforming parsers must reject such documents with a fatal error, which may cause downstream log-processing systems to drop the affected records.\n  *  Alternative StAX implementations (e.g.,  Woodstox https://github.com/FasterXML/woodstox , a transitive dependency of the Jackson XML Dataformat module): An exception is thrown during the logging call, and the log event is never delivered to its intended appender, only to Log4j's internal status logger.\n\n\nUsers are advised to upgrade to Apache Log4j Core 2.25.4, which corrects this issue by sanitizing forbidden characters before XML output.",
          "title": "Vulnerability description"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        },
        {
          "category": "other",
          "text": "TuxCare has assessed that this vulnerability does not impact any currently supported TuxCare products. This evaluation may change as new information becomes available. For additional details regarding this vulnerability and affected products, refer to the provided references.",
          "title": "Statement"
        }
      ],
      "product_status": {
        "known_not_affected": [
          "AlmaLinux-9.6:log4j-0:2.17.2-1.el9.tuxcare.els1.noarch",
          "AlmaLinux-9.6:log4j-jcl-0:2.17.2-1.el9.tuxcare.els1.noarch",
          "AlmaLinux-9.6:log4j-slf4j-0:2.17.2-1.el9.tuxcare.els1.noarch",
          "AlmaLinux-9.6:log4j-web-0:2.17.2-1.el9.tuxcare.els1.noarch",
          "Rocky Linux-9.6:log4j-0:2.17.2-1.el9.tuxcare.els1.noarch",
          "Rocky Linux-9.6:log4j-jcl-0:2.17.2-1.el9.tuxcare.els1.noarch",
          "Rocky Linux-9.6:log4j-slf4j-0:2.17.2-1.el9.tuxcare.els1.noarch",
          "Rocky Linux-9.6:log4j-web-0:2.17.2-1.el9.tuxcare.els1.noarch"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2026-34480"
        },
        {
          "category": "external",
          "summary": "https://github.com/apache/logging-log4j2/pull/4077",
          "url": "https://github.com/apache/logging-log4j2/pull/4077"
        },
        {
          "category": "external",
          "summary": "https://lists.apache.org/thread/5x0hcnng0chhghp6jgjdp3qmbbhfjzhb",
          "url": "https://lists.apache.org/thread/5x0hcnng0chhghp6jgjdp3qmbbhfjzhb"
        },
        {
          "category": "external",
          "summary": "https://logging.apache.org/cyclonedx/vdr.xml",
          "url": "https://logging.apache.org/cyclonedx/vdr.xml"
        },
        {
          "category": "external",
          "summary": "https://logging.apache.org/log4j/2.x/manual/layouts.html#XmlLayout",
          "url": "https://logging.apache.org/log4j/2.x/manual/layouts.html#XmlLayout"
        },
        {
          "category": "external",
          "summary": "https://logging.apache.org/security.html#CVE-2026-34480",
          "url": "https://logging.apache.org/security.html#CVE-2026-34480"
        },
        {
          "category": "external",
          "summary": "http://www.openwall.com/lists/oss-security/2026/04/10/9",
          "url": "http://www.openwall.com/lists/oss-security/2026/04/10/9"
        }
      ],
      "release_date": "2026-04-10T16:16:00Z",
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
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        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        },
        {
          "category": "impact",
          "date": "2026-06-12T12:56:19.283873Z",
          "details": "important",
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            "Rocky Linux-9.6:log4j-web-0:2.17.2-1.el9.tuxcare.els1.noarch"
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}