{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-6653",
        "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
        "state": "PUBLISHED",
        "assignerShortName": "canonical",
        "dateReserved": "2026-04-20T06:37:45.271Z",
        "datePublished": "2026-06-22T12:40:31.424Z",
        "dateUpdated": "2026-06-22T15:51:11.554Z"
    },
    "containers": {
        "cna": {
            "title": "libxml2: Use after free in xmlParseInternalSubset via improper entity resolution handling",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-416",
                            "description": "CWE-416 Use after free",
                            "type": "CWE"
                        },
                        {
                            "lang": "en",
                            "cweId": "CWE-611",
                            "description": "CWE-611 Improper Restriction of XML External Entity Processing",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-242",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-242 Code Injection"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "GNOME",
                    "product": "libxml2",
                    "packageName": "libxml2",
                    "repo": "https://gitlab.gnome.org/GNOME/libxml2",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "2.9.11",
                            "lessThan": "2.11.0",
                            "versionType": "semver"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Use After Free in libxml2's xmlParseInternalSubset from GNOME libxml2 version 2.9.11 to 2.11.0 allows a remote attacker to cause a denial-of-service via maliciously crafted XML input with improper entity resolution handling."
                }
            ],
            "solutions": [
                {
                    "lang": "en",
                    "value": "Upgrade to libxml2 version 2.11.0 or later"
                }
            ],
            "references": [
                {
                    "url": "https://bugs.launchpad.net/ubuntu/+source/libxml2/+bug/2141260",
                    "tags": [
                        "issue-tracking"
                    ]
                },
                {
                    "url": "https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1058",
                    "tags": [
                        "issue-tracking"
                    ]
                }
            ],
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                {
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ],
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "HIGH",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "subConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "LOW",
                        "subIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "LOW",
                        "subAvailabilityImpact": "NONE",
                        "exploitMaturity": "PROOF_OF_CONCEPT",
                        "Safety": "NOT_DEFINED",
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "valueDensity": "NOT_DEFINED",
                        "vulnerabilityResponseEffort": "NOT_DEFINED",
                        "providerUrgency": "NOT_DEFINED",
                        "version": "4.0",
                        "baseSeverity": "HIGH",
                        "baseScore": 7,
                        "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:P"
                    }
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Geoffrey Humphreys",
                    "type": "finder"
                }
            ],
            "source": {
                "discovery": "EXTERNAL"
            },
            "providerMetadata": {
                "orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
                "shortName": "canonical",
                "dateUpdated": "2026-06-22T12:40:31.424Z"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-06-22T15:51:00.508541Z",
                                "id": "CVE-2026-6653",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-06-22T15:51:11.554Z"
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    }
}