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GHSA-qrfj-mgw8-j9c6

@platejs/core HTML deserialization can trigger browser behavior during parsing

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-88976

Packages

EcosystemPackageAffectedFixed in
npm @platejs/core < 53.3.11 53.3.11
npm @platejs/core >= 54.0.0-beta.0, <= 54.0.0-beta.1 no fix listed

Details

As written in the advisory (Markdown source, shown as plain text).

### 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

External links from the advisory. They lead to third-party sites.