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CVE-2026-73090
PeerTube: Cross-origin remote video takeover via Update activity
Critical9.3EPSS 0.40%
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Critical9.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N |
| NVDNVD · Deferred | 3.1 | Critical9.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.40% · top 66% of all CVEs (5 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.3.
Weakness
Affected products
- affected < 8.2.2
References (3)
- https://github.com/Chocobozzz/PeerTube/security/advisories/GHSA-g9p4-f7h8-hc86 (opens in a new tab)x_refsource_CONFIRM
- https://github.com/Chocobozzz/PeerTube/commit/63d487d2a4a2a0e36af8c0ccb888cd23725bf7f2 (opens in a new tab)x_refsource_MISC
- https://github.com/Chocobozzz/PeerTube/releases/tag/v8.2.2 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-73090)Record last updated .