high8.7
CVE-2026-55596
Plate: Media embed provider metadata can bypass URL sanitization and execute iframe JavaScript
Impact
Plate is a rich-text editor with AI and shadcn/ui. From 53.0.0 until 53.1.4, the media embed renderer trusts serialized provider or sourceUrl metadata in useMediaState and skips parseMediaUrl protocol validation, allowing a crafted Plate document to set a known video provider while keeping url as a javascript: iframe source that the registry MediaEmbedElement renders directly as an iframe src when a victim opens the document. This issue is fixed in version 53.1.4.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | @platejs/media | >= 53.0.0, < 53.1.4 | 53.1.4 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-qj6x-xx2h-8hvv
- https://github.com/udecode/plate/security/advisories/GHSA-qj6x-xx2h-8hvv
- https://nvd.nist.gov/vuln/detail/CVE-2026-55596
- https://github.com/udecode/plate/pull/5014
- https://github.com/udecode/plate/commit/6214914ca811adf22d0ad503154494216eed68ba
- https://github.com/udecode/plate/releases/tag/v53.1.4