vulnerability · Thu 08 Oct 2026 · 17:52 UTC
GHSA-p8wg-vrv2-v86f: Handlebars: JavaScript Injection via Own Property Check Bypass
Filed UTCSource GTH ↗
Handlebars can expose the Function constructor despite its prototype-access deny list. When a template reaches Function.prototype, its own constructor property is returned before the deny list is checked. An attacker who can render a controlled template with allowProtoMethodsByDefault: true can inject and execute arbitrary JavaScript, leading to Remote Code Execution on the server. …
Signals
as the pipeline stamped them- High
- Critical vulnerability
- What to do
- Critical severity — schedule an urgent patch.
CVE
KEV from CISA · EPSS from FIRST| Id | KEV | EPSS | Reference |
|---|---|---|---|
| CVE-2026-106445 | — | 0.41% | NVD ↗ |
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