CVE-2026-57167 Chocobozzz CVE debrief

Who should care

Administrators and users of PeerTube instances should be aware of this vulnerability, as it could allow attackers to inject arbitrary HTML or JavaScript that executes in the instance origin for visitors to the attacker's videos. This vulnerability requires attention from PeerTube instance administrators, as well as users who may be affected by the vulnerability.

Technical summary

The vulnerability exists in the server-side-rendered video watch pages of PeerTube, where a schema.org JSON-LD block is embedded using JSON.stringify-ing video metadata without proper escaping. This allows an attacker to inject arbitrary HTML or JavaScript by providing a specially crafted video metadata value. The vulnerability requires a low-privileged user to exploit and can be fixed by updating PeerTube to version 8.2.2 or later.

Defensive priority

Medium priority for PeerTube instance administrators, as the vulnerability requires a low-privileged user to exploit and can be mitigated by updating to version 8.2.2 or later.

Recommended defensive actions

• Update PeerTube to version 8.2.2 or later
• Review and monitor video watch pages for suspicious activity
• Implement additional security measures, such as input validation and content security policy
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-07-10T17:17:01.430Z and last modified on 2026-07-10T18:56:43.823Z. The vulnerability exists in PeerTube versions prior to 8.2.2. Evidence is limited to public sources and may not reflect the full scope or impact of the vulnerability. Defenders should verify the vulnerability's existence and impact within their environments.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.