PeerTube: Cross-origin remote video takeover via Update activity
Priority MEDIUM 46CWE-863Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-863.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00395 33rd percentileScored 2026-11-07
Fix Fixed PeerTube (Chocobozzz): 8.2.2
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| chocobozzz | PeerTube | before 8.2.2 | 8.2.2 | Patch available | CNA |
- PeerTube Vendorchocobozzz Affected before 8.2.2 Fixed in 8.2.2 Patch available CNA
Remediation
- Fix · CNA PeerTube (Chocobozzz) Fixed in 8.2.2
Timeline
- 2026-10-02 Threatist record created from CVE-2026-73090
References
More chocobozzz vulnerabilities
- TI-2025-23959 PeerTube ActivityPub Playlist Creation Blind SSRF and DoS CVSS 3.1HIGH 7.5
- TI-2025-23958 PeerTube ActivityPub Crawl Infinite Loop DoS CVSS 3.1HIGH 7.5
- TI-2025-23957 PeerTube Arbitrary Playlist Creation via ActivityPub Protocol CVSS 3.1MEDIUM 5.3
- TI-2025-23960 PeerTube User Import Authenticated Resource Exhaustion CVSS 3.1MEDIUM 6.5
- TI-2025-23955 PeerTube User Import Authenticated Persistent Denial of Service CVSS 3.1MEDIUM 6.5
- TI-2025-23956 PeerTube Arbitrary Playlist Creation via REST API CVSS 3.1MEDIUM 4.3
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences