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CVE-2026-35031

Jellyfin is an open source self hosted media server. Versions prior to 10.11.7 contain a vulnerability chain in the subtitle upload endpoint (POST /Videos/{itemId}/Subtitles), where the Format field is not validated, allowing path traversal via the file extension and enabling arbitrary file write. This arbitrary file write can be chained into arbitrary file read via .strm files, database extraction, admin privilege escalation, and ultimately remote code execution as root via ld.so.preload. Explo
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:a7083430caed3ae383df8bfbb18c95a717884183325d88f6c2204f5832b6abd2
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 3 assertions

{"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:v2:318b0fca9b0738f53332acf0c4ffe02c17ce01a249e6260c72f851bb24aa15ff · sha256:2dd93f768da79956… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-187","description":"CWE-187: Partial String Comparison","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:318b0fca9b0738f53332acf0c4ffe02c17ce01a249e6260c72f851bb24aa15ff · sha256:2dd93f768da79956… · /containers/cna/problemTypes/2/descriptions/0

{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:318b0fca9b0738f53332acf0c4ffe02c17ce01a249e6260c72f851bb24aa15ff · sha256:2dd93f768da79956… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"jellyfin","vendor":"jellyfin","versions":[{"status":"affected","version":"< 10.11.7"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:318b0fca9b0738f53332acf0c4ffe02c17ce01a249e6260c72f851bb24aa15ff · sha256:2dd93f768da79956… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":10,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:318b0fca9b0738f53332acf0c4ffe02c17ce01a249e6260c72f851bb24aa15ff · sha256:2dd93f768da79956… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

3 source assertions
{"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:v2:318b0fca9b0738f53332acf0c4ffe02c17ce01a249e6260c72f851bb24aa15ff · sha256:2dd93f768da79956… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-187","description":"CWE-187: Partial String Comparison","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:318b0fca9b0738f53332acf0c4ffe02c17ce01a249e6260c72f851bb24aa15ff · sha256:2dd93f768da79956… · /containers/cna/problemTypes/2/descriptions/0
{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:318b0fca9b0738f53332acf0c4ffe02c17ce01a249e6260c72f851bb24aa15ff · sha256:2dd93f768da79956… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/jellyfin/jellyfin/releases/tag/v10.11.7","tags":["x_refsource_MISC"],"url":"https://github.com/jellyfin/jellyfin/releases/tag/v10.11.7"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:318b0fca9b0738f53332acf0c4ffe02c17ce01a249e6260c72f851bb24aa15ff · sha256:2dd93f768da79956… · /containers/cna/references/1
{"name":"https://github.com/jellyfin/jellyfin/security/advisories/GHSA-j2hf-x4q5-47j3","tags":["x_refsource_CONFIRM"],"url":"https://github.com/jellyfin/jellyfin/security/advisories/GHSA-j2hf-x4q5-47j3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:318b0fca9b0738f53332acf0c4ffe02c17ce01a249e6260c72f851bb24aa15ff · sha256:2dd93f768da79956… · /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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