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    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-103441",
        "assignerOrgId": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc",
        "state": "PUBLISHED",
        "assignerShortName": "wikimedia-foundation",
        "dateReserved": "2026-09-30T15:41:01.270Z",
        "datePublished": "2026-09-30T15:59:42.361Z",
        "dateUpdated": "2026-09-30T15:59:42.361Z"
    },
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            "providerMetadata": {
                "orgId": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc",
                "shortName": "wikimedia-foundation",
                "dateUpdated": "2026-09-30T15:59:42.361Z"
            },
            "title": "Unauthenticated arbitrary file deletion through Wikibase serialized entity parsing",
            "datePublic": "2026-09-30T15:46:00.000Z",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-502",
                            "description": "CWE-502 Deserialization of untrusted data",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-35",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-35 Leverage Executable Code in Non-Executable Files"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "The Wikimedia Foundation",
                    "product": "MediaWiki Wikibase extension",
                    "repo": "https://gerrit.wikimedia.org/r/mediawiki/extensions/Wikibase",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "1.46"
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                            "version": "1.45"
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                            "status": "affected",
                            "version": "1.43"
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                    ],
                    "defaultStatus": "unaffected"
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            "descriptions": [
                {
                    "lang": "en",
                    "value": "Deserialization of untrusted data vulnerability in The Wikimedia Foundation MediaWiki Wikibase extension allows Leverage Executable Code in Non-Executable Files.\n\nThis issue affects MediaWiki Wikibase extension: 1.46, 1.45, and 1.43.",
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                            "base64": false,
                            "value": "Deserialization of untrusted data vulnerability in The Wikimedia Foundation MediaWiki Wikibase extension allows Leverage Executable Code in Non-Executable Files.<p>This issue affects MediaWiki Wikibase extension: 1.46, 1.45, and 1.43.</p>"
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            ],
            "references": [
                {
                    "url": "https://phabricator.wikimedia.org/T435210"
                },
                {
                    "url": "https://gerrit.wikimedia.org/r/q/Id35bf747e48370e474d9b9444bd7520b24836e8d"
                }
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                            "value": "GENERAL"
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                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "HIGH",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "LOW",
                        "userInteraction": "ACTIVE",
                        "vulnConfidentialityImpact": "HIGH",
                        "subConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
                        "subIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "LOW",
                        "subAvailabilityImpact": "LOW",
                        "exploitMaturity": "PROOF_OF_CONCEPT",
                        "Safety": "NEGLIGIBLE",
                        "Automatable": "YES",
                        "Recovery": "IRRECOVERABLE",
                        "valueDensity": "CONCENTRATED",
                        "vulnerabilityResponseEffort": "MODERATE",
                        "providerUrgency": "RED",
                        "version": "4.0",
                        "baseSeverity": "HIGH",
                        "baseScore": 7.2,
                        "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L/E:P/S:N/AU:Y/R:I/V:C/RE:M/U:Red"
                    }
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Marco Paciaroni (BomboBombone)",
                    "type": "reporter"
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            ],
            "source": {
                "discovery": "INTERNAL"
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}