Handlebarsjs Handlebars

Remote Code Execution (RCE)

Prototype Pollution

Handlebars.js has JavaScript Injection via AST Type Confusion

Handlebars.js has JavaScript Injection in CLI Precompiler via Unescaped Names and Options

Handlebars before 3.0.8 and 4.x before 4.5.3 is vulnerable to Arbitrary Code Execution. The lookup helper fails to properly validate templates, allowing attackers to submit templates that execute arbitrary JavaScript. This can be used to run arbitrary code on a server processing Handlebars templates or in a victim's browser (effectively serving as XSS).

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

Handlebars.js has JavaScript Injection via AST Type Confusion when passing an object as dynamic partial

Handlebars before 4.4.5 allows Regular Expression Denial of Service (ReDoS) because of eager matching. The parser may be forced into an endless loop while processing crafted templates. This may allow attackers to exhaust system resources.

Handlebars.js has Denial of Service via Malformed Decorator Syntax in Template Compilation

Handlebars.js has Prototype Pollution Leading to XSS through Partial Template Injection