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Handlebars: XSS vulnerability via partial template resolution

A security issue has been discovered in the Handlebars template engine allowing Cross Site Scripting attacks.

Published 22sem1 sourceNotable
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The fact

The vulnerability exists in the partial template resolution mechanism, where malicious code can be injected and executed.

This flaw affects web applications using Handlebars for client-side or server-side rendering without proper sanitization.

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Auto-synthesis from 1 media source · identified on June 7, 2026
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