vetkit.js.postmessage.missing-origin-check
A window message event handler uses event.data without checking event.origin (or event.source). Any page that can open or frame this one can send it messages.
Last updated:
Suite: Security
javascript, typescript
A window message event handler uses event.data without checking event.origin (or event.source). Any page that can open or frame this one can send it messages.
Category: SECURITY · Engine rule severity: INFO
How to fix it
Return early unless event.origin is in an allow-list of expected origins before reading event.data.
References
Source: packages/engine/rules/sast/javascript.yml.
Generated from shipped rule definitions at build time. Matching is a review signal, not proof of exploitability. “generic” denotes text matching, not complete language or framework coverage. Runtime configuration and available tools affect whether a rule runs.