CVE-2026-73090Network attack vectorHinoki check available

Unauthenticated video takeover via missing host authorization

Published Aug 11, 2026 · Updated Aug 11, 2026

Authorization bypass in PeerTube before 8.2.2 allows remote attackers to take over federated videos through ActivityPub Update messages. The processUpdateActivity and processUpdateVideo paths accept a signed Video Update without confirming that the signing actor and video identifier share an authorized host. A malicious federated server needs no target account and can rewrite stored metadata, visibility, media files, and HLS URLs for videos federated from other servers.

CVSS severity9.3
Critical
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authorization bypass in PeerTube before 8.2.2 allows remote attackers to take over federated videos through ActivityPub Update messages. The processUpdateActivity and processUpdateVideo paths accept a signed Video Update without confirming that the signing actor and video identifier share an authorized host. A malicious federated server needs no target account and can rewrite stored metadata, visibility, media files, and HLS URLs for videos federated from other servers.

The record

CVE
CVE-2026-73090
Published
Aug 11, 2026
Updated
Aug 11, 2026
Vendor
Framasoft
Product
PeerTube
Classifications
CWE-863, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 8.2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Framasoft · PeerTubeversion=< 8.2.2

Published CVSS scores

9.3GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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