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.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-79"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55596.json"
}{
"extracted_events": [
{
"range": [
{
"introduced": "53.0.0"
},
{
"fixed": "53.1.4"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "6214914ca811adf22d0ad503154494216eed68ba"
}
],
"source": "REFERENCES_COMMIT"
},
{
"original_tag": "v53.1.4",
"range": [
{
"fixed": "c5b8e60148c5fbe4c8047cd5cf049127c6091314"
}
],
"source": "REFERENCES_TAG"
}
]
}