{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-49247", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-28T14:33:01.178Z", "datePublished": "2026-06-24T18:18:46.137Z", "dateUpdated": "2026-06-24T18:18:46.137Z"}, "containers": {"cna": {"title": "Jellyfin: Potential Authenticated path traversal in /ClientLog/Document", "problemTypes": [{"descriptions": [{"cweId": "CWE-22", "lang": "en", "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/jellyfin/jellyfin/security/advisories/GHSA-jg92-mrxq-vv75", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/jellyfin/jellyfin/security/advisories/GHSA-jg92-mrxq-vv75"}], "affected": [{"vendor": "jellyfin", "product": "jellyfin", "versions": [{"version": ">= 10.9.0, < 10.11.10", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-06-24T18:18:46.137Z"}, "descriptions": [{"lang": "en", "value": "Jellyfin is an open source self hosted media server. From 10.9.0 until 10.11.10, the POST /ClientLog/Document endpoint accepts the Authorization header's Client and Version fields and uses them unsanitized as components of the on-disk filename when persisting client-uploaded log documents. As a result, any authenticated non-admin user can include ../ sequences in the Client field to cause Jellyfin to write attacker-controlled content to arbitrary paths reachable by the Jellyfin service user, with a forced .log suffix. This vulnerability is fixed in 10.11.10."}], "source": {"advisory": "GHSA-jg92-mrxq-vv75", "discovery": "UNKNOWN"}}}}

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