Vulnerability · Published Aug 11, 2026 · Assigned by GitHub_M

CVE-2026-73090PeerTube: Cross-origin remote video takeover via Update activity

Critical 9.3

In plain English

A critical-severity incorrect authorization in PeerTube from Chocobozzz. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities).

Severity (CVSS 3.1)9.3Critical

Exploit odds (30 days)0.4%top 66.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

PeerTube 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.

Affected products (as reported)

Vendor	Product	Versions
Chocobozzz	PeerTube	< 8.2.2

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N

References

https://github.com/Chocobozzz/PeerTube/security/advisories/GHSA-g9p4-f7h8-hc86 x_refsource_CONFIRM
https://github.com/Chocobozzz/PeerTube/commit/63d487d2a4a2a0e36af8c0ccb888cd23725bf7f2 x_refsource_MISC
https://github.com/Chocobozzz/PeerTube/releases/tag/v8.2.2 x_refsource_MISC