What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 9.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-11 · updated 2026-10-24
• Weakness: CWE-863

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

• chocobozzz/peertube: before 8.2.2

References

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

Get alerted when CVE-2026-73090 or the next vulnerability affects your stack