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CVE-2026-35034

Jellyfin is an open source self hosted media server. Versions prior to 10.11.7 contain a denial of service vulnerability in the SyncPlay group creation endpoint (POST /SyncPlay/New), where an authenticated user can create groups with names of unlimited size due to insufficient input validation. By sending large payloads combined with arbitrary group IDs, an attacker can lock out the endpoint for other clients attempting to join SyncPlay groups and significantly increase the memory usage of the J
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:f7cd9cedf5227d74f952ce2d8f82eadb7d7f06a5ce86417ca7e52ffbb9c4cca2
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":"< 10.11.7"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bc2259d26c68d62d331f144c71ccb6989399bb774dc0a5002d671af57896cd51 · sha256:687035521e66fb55… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:bc2259d26c68d62d331f144c71ccb6989399bb774dc0a5002d671af57896cd51 · sha256:687035521e66fb55… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:bc2259d26c68d62d331f144c71ccb6989399bb774dc0a5002d671af57896cd51 · sha256:687035521e66fb55… · /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:bc2259d26c68d62d331f144c71ccb6989399bb774dc0a5002d671af57896cd51 · sha256:687035521e66fb55… · /containers/cna/references/1
{"name":"https://github.com/jellyfin/jellyfin/security/advisories/GHSA-v2jv-54xj-h76w","tags":["x_refsource_CONFIRM"],"url":"https://github.com/jellyfin/jellyfin/security/advisories/GHSA-v2jv-54xj-h76w"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bc2259d26c68d62d331f144c71ccb6989399bb774dc0a5002d671af57896cd51 · sha256:687035521e66fb55… · /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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