ActivityPub Vulnerability in PeerTube Affects Video Metadata Management
CVE-2026-73090

9.3CRITICAL

Key Information:

Vendor

Chocobozzz

Status
Peertube
Vendor
CVE Published:
11 August 2026

What is CVE-2026-73090?

A significant vulnerability exists in PeerTube, an ActivityPub-federated video streaming platform. Versions prior to 8.2.2 suffer from an improper authorization issue where the functions processUpdateActivity and processUpdateVideo accept unverified ActivityPub updates containing Video objects. This flaw permits a malicious federated server to manipulate another server's video metadata, potentially altering visibility settings, media files, and HLS URLs. To mitigate this risk, users are advised to update to version 8.2.2 or later.

Affected Version(s)

PeerTube < 8.2.2

References

https://github.com/Chocobozzz/PeerTube/security/advisorie...
x_refsource_CONFIRM
https://github.com/Chocobozzz/PeerTube/commit/63d487d2a4a...
x_refsource_MISC
https://github.com/Chocobozzz/PeerTube/releases/tag/v8.2.2
x_refsource_MISC

CVSS V3.1

Score:
9.3
Severity:
CRITICAL
Confidentiality:
Low
Integrity:
High
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.