CVE-2026-106446

Handlebars provides the power necessary to let users build semantic templates. From 4.0.0 until 4.7.10, Handlebars.compile and Handlebars.precompile accept pre-parsed AST objects while validating only selected PathExpression, NumberLiteral, and BooleanLiteral values. This issue bypasses the AST...

CVE-2026-106446

Handlebars provides the power necessary to let users build semantic templates. From 4.0.0 until 4.7.10, Handlebars.compile and Handlebars.precompile accept pre-parsed AST objects while validating only selected PathExpression, NumberLiteral, and BooleanLiteral values. This issue bypasses the AST...

CVE-2026-106446 Handlebars: JavaScript Injection via AST Type Confusion in compile (Program.blockParams)

Handlebars provides the power necessary to let users build semantic templates. From 4.0.0 until 4.7.10, Handlebars.compile and Handlebars.precompile accept pre-parsed AST objects while validating only selected PathExpression, NumberLiteral, and BooleanLiteral values. This issue bypasses the AST...

CVE-2026-106446 Handlebars: JavaScript Injection via AST Type Confusion in compile (Program.blockParams)

Handlebars provides the power necessary to let users build semantic templates. From 4.0.0 until 4.7.10, Handlebars.compile and Handlebars.precompile accept pre-parsed AST objects while validating only selected PathExpression, NumberLiteral, and BooleanLiteral values. This issue bypasses the AST...

CVE-2026-106446 Handlebars: JavaScript Injection via AST Type Confusion in compile (Program.blockParams)

Handlebars provides the power necessary to let users build semantic templates. From 4.0.0 until 4.7.10, Handlebars.compile and Handlebars.precompile accept pre-parsed AST objects while validating only selected PathExpression, NumberLiteral, and BooleanLiteral values. This issue bypasses the AST...

CVE-2026-106446

Handlebars provides the power necessary to let users build semantic templates. From 4.0.0 until 4.7.10, Handlebars.compile and Handlebars.precompile accept pre-parsed AST objects while validating only selected PathExpression, NumberLiteral, and BooleanLiteral values. This issue bypasses the AST...

CVE-2026-106446

Handlebars versions 4.0.0 through 4.7.10 are vulnerable to JavaScript Injection due to AST Type Confusion in the compile() and precompile() functions. The root cause is that the compiler validates only a subset of AST values (PathExpression, NumberLiteral, and BooleanLiteral), allowing an attacke...

CVE-2026-106445 Handlebars: JavaScript Injection via Own Property Check Bypass

Handlebars provides the power necessary to let users build semantic templates. From 4.0.0 until 4.7.10, Handlebars lookupProperty returns Function.prototype.constructor before applying the prototype-access deny list because constructor is an own property of Function.prototype. When an attacker ca...

CVE-2026-106445 Handlebars: JavaScript Injection via Own Property Check Bypass

Handlebars provides the power necessary to let users build semantic templates. From 4.0.0 until 4.7.10, Handlebars lookupProperty returns Function.prototype.constructor before applying the prototype-access deny list because constructor is an own property of Function.prototype. When an attacker ca...

CVE-2026-106445

Handlebars provides the power necessary to let users build semantic templates. From 4.0.0 until 4.7.10, Handlebars lookupProperty returns Function.prototype.constructor before applying the prototype-access deny list because constructor is an own property of Function.prototype. When an attacker ca...

CVE-2026-106445 Handlebars: JavaScript Injection via Own Property Check Bypass

Handlebars provides the power necessary to let users build semantic templates. From 4.0.0 until 4.7.10, Handlebars lookupProperty returns Function.prototype.constructor before applying the prototype-access deny list because constructor is an own property of Function.prototype. When an attacker ca...

CVE-2026-106445

The Handlebars template engine is vulnerable to JavaScript Injection in versions 4.0.0 through 4.7.10 . The root cause is an own property check bypass in the lookupProperty function, which returns Function.prototype.constructor before applying the prototype-access deny list. If an attacker can re...

CVE-2026-106445

Handlebars provides the power necessary to let users build semantic templates. From 4.0.0 until 4.7.10, Handlebars lookupProperty returns Function.prototype.constructor before applying the prototype-access deny list because constructor is an own property of Function.prototype. When an attacker ca...

CVE-2026-106444

The Handlebars templating engine (versions 4.0.0 through 4.7.10 ) is vulnerable to JavaScript Injection due to improper escaping in the Handlebars.precompile() function. Specifically, lib/handlebars/compiler/code-gen.js uses quotedString() to emit static template text without escaping sequences t...

CVE-2026-106444 Handlebars: JavaScript Injection via Unsafe Inline Embedding of Precompiled Templates

Handlebars provides the power necessary to let users build semantic templates. From 4.0.0 until 4.7.10, Handlebars.precompile uses quotedString in lib/handlebars/compiler/code-gen.js to emit static template text into generated JavaScript without escaping sequences that terminate an enclosing HTML...

CVE-2026-106444 Handlebars: JavaScript Injection via Unsafe Inline Embedding of Precompiled Templates

Handlebars provides the power necessary to let users build semantic templates. From 4.0.0 until 4.7.10, Handlebars.precompile uses quotedString in lib/handlebars/compiler/code-gen.js to emit static template text into generated JavaScript without escaping sequences that terminate an enclosing HTML...

CVE-2026-106444

Handlebars provides the power necessary to let users build semantic templates. From 4.0.0 until 4.7.10, Handlebars.precompile uses quotedString in lib/handlebars/compiler/code-gen.js to emit static template text into generated JavaScript without escaping sequences that terminate an enclosing HTML...

Cross-site Scripting (XSS)

Overview org.webjars.npm:handlebars is an extension to the Mustache templating language. Affected versions of this package are vulnerable to Cross-site Scripting XSS in the quotedString function in lib/handlebars/compiler/code-gen.js, which writes static template text into the JavaScript that...

CVE-2026-106444 Handlebars: JavaScript Injection via Unsafe Inline Embedding of Precompiled Templates

Handlebars provides the power necessary to let users build semantic templates. From 4.0.0 until 4.7.10, Handlebars.precompile uses quotedString in lib/handlebars/compiler/code-gen.js to emit static template text into generated JavaScript without escaping sequences that terminate an enclosing HTML...

CVE-2026-106444

Handlebars provides the power necessary to let users build semantic templates. From 4.0.0 until 4.7.10, Handlebars.precompile uses quotedString in lib/handlebars/compiler/code-gen.js to emit static template text into generated JavaScript without escaping sequences that terminate an enclosing HTML...