Handlebars: JavaScript Injection via Own Property Check Bypass

Summary 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: tr...

GHSA-P8WG-VRV2-V86F Handlebars: JavaScript Injection via Own Property Check Bypass

Summary 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: tr...

cve-2026-33937

CVE-2026-33937 - Exploit PoC per RCE in Handlebars Descrizione CVE-2026-33937 è una vulnerabilità critica di Remote Code Execution RCE in Handlebars causata dalla gestione non sicura dell'input dell'Abstract Syntax Tree AST. La vulnerabilità consente agli attaccanti di iniettare codice JavaScript...

ROOT-APP-NPM-CVE-2019-20920 CVE-2019-20920 in handlebars - Patched by Root

Root has patched CVE-2019-20920 in the handlebars package for Root:npm. Multiple fixed versions available...

ROOT-APP-NPM-CVE-2026-106446 CVE-2026-106446 in handlebars - Patched by Root

Root has patched CVE-2026-106446 in the handlebars package for Root:npm. Multiple fixed versions available...

CVE-2026-29053

Dies ist eine Überarbeitung des Repos von rootxran für dieselbe CVE - https://github.com/rootxran/CVE-2026-29053 Bei Tests gegen bestimmte Ghost-CMS-Umgebungen löste das ursprüngliche Theme-Payload einen Fatal Handlebars Error aus. Das CMS konnte das bösartige Theme nicht aktivieren, da es auf...

CVE-2026-106444

A flaw was found in Handlebars. This vulnerability allows a remote attacker to execute arbitrary script code through Cross-Site Scripting XSS. When an application precompiles untrusted template text and embeds the generated output directly into an inline web script block, static content is not...

CVE-2026-106445

Handlebars provides the power necessary to let users build semantic te...

CVE-2026-106444

Handlebars provides the power necessary to let users build semantic te...

CVE-2026-106446

Handlebars provides the power necessary to let users build semantic te...

UBUNTU-CVE-2026-106446

Handlebars provides the power necessary to let users build semantic te...

UBUNTU-CVE-2026-106445

Handlebars provides the power necessary to let users build semantic te...

UBUNTU-CVE-2026-106444

Handlebars provides the power necessary to let users build semantic te...

Incomplete List of Disallowed Inputs

Overview org.webjars.npm:handlebars is an extension to the Mustache templating language. Affected versions of this package are vulnerable to Incomplete List of Disallowed Inputs in the lookupProperty function in lib/handlebars/runtime.js, which returns the resolved value as soon as...

Incomplete List of Disallowed Inputs

Overview handlebars is an extension to the Mustache templating language. Affected versions of this package are vulnerable to Incomplete List of Disallowed Inputs in the lookupProperty function in lib/handlebars/runtime.js, which returns the resolved value as soon as...

DEBIAN-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...

DEBIAN-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

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-2026-106445

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-2026-106446

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...