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CVE-2026-49247

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, wit
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d8bde55f854301cfda5d61f4646835c3ec4f8446c43d909134be36961c841171
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"jellyfin","vendor":"jellyfin","versions":[{"status":"affected","version":">= 10.9.0, < 10.11.10"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b6c25d7e5da3f94eac95003d807e0f9824d8597e1b129f52398c218c5415fc07 · sha256:2c143dc22a4abfb4… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"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"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:b6c25d7e5da3f94eac95003d807e0f9824d8597e1b129f52398c218c5415fc07 · sha256:2c143dc22a4abfb4… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-22","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:b6c25d7e5da3f94eac95003d807e0f9824d8597e1b129f52398c218c5415fc07 · sha256:2c143dc22a4abfb4… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"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"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b6c25d7e5da3f94eac95003d807e0f9824d8597e1b129f52398c218c5415fc07 · sha256:2c143dc22a4abfb4… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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