{"id":"CVE-2026-88976","state":"PUBLISHED","title":"@platejs/core HTML deserialization can trigger browser behavior during parsing","description":"Plate is a rich-text editor with AI and shadcn/ui. Prior to 53.3.11, and in the discontinued 54.0.0-beta.0 through 54.0.0-beta.1 builds, Plate core HTML deserialization APIs parse supplied HTML strings in the active document. When an application passes untrusted or cross-user HTML to these APIs, certain HTML attributes can trigger browser behavior before the HTML is converted into editor nodes. This can allow attacker-controlled script to execute in the consuming application's origin when another user loads the deserialized content. This issue is fixed in version 53.3.11.","publishedAt":"2026-09-16T14:11:39.881Z","updatedAt":"2026-09-16T15:25:38.481Z","severity":{"score":6.1,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["udecode plate"],"affected":[{"vendor":"udecode","product":"plate","versions":[{"version":"< 53.3.11","status":"affected"},{"version":">= 54.0.0-beta.0, <= 54.0.0-beta.1","status":"affected"}]}],"references":["https://github.com/udecode/plate/security/advisories/GHSA-qrfj-mgw8-j9c6","https://github.com/udecode/plate/pull/5117","https://github.com/udecode/plate/commit/d02afe45d5ec3a9fb95e0745bc5820ff18a3c12b","https://github.com/udecode/plate/releases/tag/v53.3.11"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/88xxx/CVE-2026-88976.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-88976","state":"PUBLISHED","datePublished":"2026-09-16T14:11:39.881Z","dateUpdated":"2026-09-16T15:25:38.481Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-09-10T16:02:31.342Z"},"containers":{"cna":{"title":"@platejs/core HTML deserialization can trigger browser behavior during parsing","descriptions":[{"lang":"en","value":"Plate is a rich-text editor with AI and shadcn/ui. Prior to 53.3.11, and in the discontinued 54.0.0-beta.0 through 54.0.0-beta.1 builds, Plate core HTML deserialization APIs parse supplied HTML strings in the active document. When an application passes untrusted or cross-user HTML to these APIs, certain HTML attributes can trigger browser behavior before the HTML is converted into editor nodes. This can allow attacker-controlled script to execute in the consuming application's origin when another user loads the deserialized content. This issue is fixed in version 53.3.11."}],"affected":[{"vendor":"udecode","product":"plate","versions":[{"version":"< 53.3.11","status":"affected"},{"version":">= 54.0.0-beta.0, <= 54.0.0-beta.1","status":"affected"}]}],"references":[{"url":"https://github.com/udecode/plate/security/advisories/GHSA-qrfj-mgw8-j9c6","name":"https://github.com/udecode/plate/security/advisories/GHSA-qrfj-mgw8-j9c6","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/udecode/plate/pull/5117","name":"https://github.com/udecode/plate/pull/5117","tags":["x_refsource_MISC"]},{"url":"https://github.com/udecode/plate/commit/d02afe45d5ec3a9fb95e0745bc5820ff18a3c12b","name":"https://github.com/udecode/plate/commit/d02afe45d5ec3a9fb95e0745bc5820ff18a3c12b","tags":["x_refsource_MISC"]},{"url":"https://github.com/udecode/plate/releases/tag/v53.3.11","name":"https://github.com/udecode/plate/releases/tag/v53.3.11","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-16T14:11:39.881Z"},"source":{"advisory":"GHSA-qrfj-mgw8-j9c6","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-16T15:24:04.653416Z","id":"CVE-2026-88976","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-16T15:25:38.481Z"}}]}}}