{"id":"CVE-2026-55596","aliases":["GHSA-qj6x-xx2h-8hvv"],"url":"https://o3.security/vulnerability/CVE-2026-55596","summary":"Plate: Media embed provider metadata can bypass URL sanitization and execute iframe JavaScript","details":"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.","published":"2026-07-08T20:27:58.987Z","modified":"2026-08-12T03:51:37.794647281Z","cvss":{"score":8.7,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N"},"epss":{"score":0.0043,"percentile":0.35627,"asOf":"2026-08-25"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"@platejs/media","fixedVersion":"53.1.4"}],"fix":{"url":"https://github.com/udecode/plate/commit/6214914ca811adf22d0ad503154494216eed68ba","label":"udecode/plate@6214914"},"references":[{"type":"WEB","url":"https://github.com/udecode/plate/releases/tag/v53.1.4"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55596.json"},{"type":"ADVISORY","url":"https://github.com/udecode/plate/security/advisories/GHSA-qj6x-xx2h-8hvv"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55596"},{"type":"FIX","url":"https://github.com/udecode/plate/commit/6214914ca811adf22d0ad503154494216eed68ba"},{"type":"FIX","url":"https://github.com/udecode/plate/pull/5014"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:37.794647281Z"}}