What’s Vulnerable › Vulnerabilities

CVE-2026-57167: PeerTube: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

• Severity: medium (CVSS 5.1 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-10 · updated 2026-10-25
• Weakness: CWE-80

Description

PeerTube is an ActivityPub-federated video streaming platform. Prior to 8.2.2, server-side-rendered video watch pages embed a schema.org JSON-LD block by JSON.stringify-ing video metadata without escaping less-than, greater-than, or slash characters, allowing a value containing the byte sequence that closes a script element to inject arbitrary HTML or JavaScript that executes in the instance origin for visitors to the attacker's videos. This issue is fixed in version 8.2.2.

Affected products

• chocobozzz/peertube: before 8.2.2

References

• https://github.com/Chocobozzz/PeerTube/commit/45394d701b08e87d72b8f0c1866b881f2becbde3
• https://github.com/Chocobozzz/PeerTube/releases/tag/v8.2.2
• https://github.com/Chocobozzz/PeerTube/security/advisories/GHSA-jxwq-h9xv-hr28

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