PeerTube: Cross-origin remote video takeover via Update activity

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-73090
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-11 18:18:26 UTC
Updated2026-08-11 18:18:26 UTC
DescriptionPeerTube is an ActivityPub-federated video streaming platform. Prior to 8.2.2, processUpdateActivity and processUpdateVideo accept an ActivityPub Update containing a Video object without verifying that byActor.url is authorized for the host in videoObject.id, allowing a malicious federated server to rewrite another server's video metadata, visibility, media file, and HLS URLs. This issue is fixed in version 8.2.2.

Risk And Classification

Primary CVSS: v3.1 9.3 CRITICAL from [email protected]

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

Problem Types: CWE-863 | CWE-863 CWE-863: Incorrect Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.3CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N
3.1CNADECLARED9.3CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Chocobozzz PeerTube affected < 8.2.2 Not specified

References

ReferenceSourceLinkTags
github.com/Chocobozzz/PeerTube/releases/tag/v8.2.2 [email protected] github.com
github.com/Chocobozzz/PeerTube/commit/63d487d2a4a2a0e36af8c0ccb888cd2372... [email protected] github.com
github.com/Chocobozzz/PeerTube/security/advisories/GHSA-g9p4-f7h8-hc86 [email protected] github.com
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