CVE-2026-33938 Handlebars.js has JavaScript Injection via AST Type Confusion by tampering @partial-block

Handlebars provides the power necessary to let users build semantic templates. In versions 4.0.0 through 4.7.8, the @partial-block special variable is stored in the template data context and is reachable and mutable from within a template via helpers that accept arbitrary objects. When a helper...

PT-2026-28570

Name of the Vulnerable Software and Affected Versions Handlebars versions 4.0.0 through 4.7.8 Description Handlebars allows users to build semantic templates. A flaw exists where the @partial-block special variable is stored in the template data context and is mutable from within a template via...