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

Quick assessment

Affected
Chocobozzz PeerTube
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Chocobozzz PeerTube是Chocobozzz个人开发者开源的一个去中心化视频分享平台。 Chocobozzz PeerTube 8.2.2之前版本存在授权问题漏洞，该漏洞源于未正确验证byActor.url的授权，可能导致恶意联邦服务器重写其他服务器的视频元数据、可见性、媒体文件和HLS URL。

CVSS 9.3 · Critical EPSS 0.40% · P32

Affected Version Matrix 1

VendorProduct Version RangeStatus
Chocobozzz PeerTube < 8.2.2 affected
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I. Basic Information for CVE-2026-73090

Vulnerability Information
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Vulnerability Title
PeerTube: Cross-origin remote video takeover via Update activity
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Chocobozzz PeerTube 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Chocobozzz PeerTube是Chocobozzz个人开发者开源的一个去中心化视频分享平台。 Chocobozzz PeerTube 8.2.2之前版本存在授权问题漏洞，该漏洞源于未正确验证byActor.url的授权，可能导致恶意联邦服务器重写其他服务器的视频元数据、可见性、媒体文件和HLS URL。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Chocobozzz PeerTube < 8.2.2 -

II. Public POCs for CVE-2026-73090

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9827 chars
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III. Intelligence Information for CVE-2026-73090

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Patches & Fixes for CVE-2026-73090 (2)

Vendor Advisories for CVE-2026-73090 (1)

IV. Related Vulnerabilities

Same product: PeerTube
Same vendor: Chocobozzz
Same weakness: CWE-863

V. Comments for CVE-2026-73090

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