Kyoo: Transcoder serves uncataloged files from the media directory

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-77385
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-18 18:17:14 UTC
Updated2026-09-18 20:17:22 UTC
DescriptionKyoo is a self-hosted media server focused on movies, series, and anime. Prior to 5.1.0, a registered user with the core.play permission could supply a base64-encoded filesystem path to the transcoder. The path handling in transcoder/src/api/path.go cleaned the value and checked only that it began with Settings.SafePath before getHash processed it, while transcoder/src/api/streams.go served the accepted path without verifying a Kyoo catalog record. This missing catalog-level authorization allowed the user to retrieve hidden, temporary, operational, or other uncataloged files beneath the media directory when the path was known or guessed. This vulnerability is fixed in 5.1.0.

Risk And Classification

Primary CVSS: v3.1 4.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS: 0.003150000 probability, percentile 0.245960000 (date 2026-09-21)

Problem Types: CWE-639 | CWE-862 | CWE-639 CWE-639: Authorization Bypass Through User-Controlled Key | CWE-862 CWE-862: Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
3.1CNADECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Zoriya Kyoo affected < 5.1.0 Not specified

References

ReferenceSourceLinkTags
github.com/zoriya/Kyoo/pull/1577 [email protected] github.com
github.com/zoriya/Kyoo/security/advisories/GHSA-fc8v-vr3q-hc46 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/zoriya/Kyoo/commit/c542adb5dc6d681e6491b28b5ac618c35c446d91 [email protected] github.com
github.com/zoriya/Kyoo/releases/tag/v5.1.0 [email protected] github.com
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