Summary
@platejs/core HTML deserialization can trigger browser behavior during parsing
Advisory details
Summary
HTML strings passed to Plate's core deserialization APIs were parsed in the active document. Certain HTML attributes could therefore trigger browser behavior during parsing, before the content was converted into editor nodes.
Applications that deserialize HTML from untrusted or cross-user sources may be affected.
Impact
An attacker who can control HTML later deserialized in another user's browser may be able to execute script in that application's origin.
Remediation
Upgrade to @platejs/core 53.3.11 or later. Users of the discontinued 54.0.0 beta builds should install the fixed stable line. Applications should also sanitize untrusted HTML before rendering it; inert parsing is not a substitute for sanitization.
References
- https://github.com/advisories/GHSA-qrfj-mgw8-j9c6
- https://github.com/udecode/plate/security/advisories/GHSA-qrfj-mgw8-j9c6
- https://nvd.nist.gov/vuln/detail/CVE-2026-88976
- https://github.com/udecode/plate/pull/5117
- https://github.com/udecode/plate/commit/d02afe45d5ec3a9fb95e0745bc5820ff18a3c12b
- https://github.com/udecode/plate/releases/tag/v53.3.11
Related vulnerabilities
All Supply chain →- CRITICALCVE-2026-102989
TanStack Router: Unauthenticated reflected XSS in TanStack Start server-function responses
- CRITICALCVE-2026-104252
Vitess vttablet /twopcz reflected XSS
- MEDIUMCVE-2026-104250
unstructured: Stored XSS via unescaped HTML generation
- HIGHCVE-2026-96230
Microsoft Security Advisory CVE-2026-96230 - ASP.NET Core Remote Code Execution Vulnerability
- HIGHCVE-2026-108260
@tinacms/web-components: `tina-markdown` writes rich-text link URLs into `href` without scheme validation, allowing stored XSS
- CRITICALCVE-2026-107845
Contao: Cross-site scripting in the comments bundle