EUVD-2026-76029

hbs is an Express view engine wrapper for Handlebars. Version 4.3.0 can crash the Node.js process during output escaping when an async helper, registered with registerAsyncHelper, resolves to an object whose toHTML property is truthy but not callable. Handlebars escapeExpression calls the toHTML...

CVE-2026-87123

hbs is an Express view engine wrapper for Handlebars. In version 4.3.0 , an unhandled TypeError is thrown during output escaping when an async helper (registered via registerAsyncHelper) resolves to an object whose toHTML property is truthy but not callable. Because the async substitution execute...

CVE-2026-16231

hbs is an Express view engine that wraps Handlebars. Its registerAsyncHelper API bypasses Handlebars' automatic HTML escaping: an async helper returns an opaque placeholder during the first render pass, so the double-brace expression escapes only the placeholder, and after rendering hbs substitut...

CVE-2026-16231 hbs vulnerable to XSS via registerAsyncHelper output-escaping bypass

hbs is an Express view engine that wraps Handlebars. Its registerAsyncHelper API bypasses Handlebars' automatic HTML escaping: an async helper returns an opaque placeholder during the first render pass, so the double-brace expression escapes only the placeholder, and after rendering hbs substitut...

CVE-2026-16231 hbs vulnerable to XSS via registerAsyncHelper output-escaping bypass

hbs is an Express view engine that wraps Handlebars. Its registerAsyncHelper API bypasses Handlebars' automatic HTML escaping: an async helper returns an opaque placeholder during the first render pass, so the double-brace expression escapes only the placeholder, and after rendering hbs substitut...

CVE-2026-16231: Improper Neutralization of Input During Web Page Generation

hbs is an Express view engine that wraps Handlebars. Its registerAsyncHelper API bypasses Handlebars' automatic HTML escaping: an async helper returns an opaque placeholder during the first render pass, so the double-brace expression escapes only the placeholder, and after rendering hbs substitut...

PT-2026-81252

Name of the Vulnerable Software and Affected Versions hbs versions 2.1.0 through 4.2.1 Description The registerAsyncHelper API in the hbs Express view engine bypasses the automatic HTML escaping of Handlebars. During the first render pass, an async helper returns an opaque placeholder that is...

CVE-2021-32822

The npm hbs package is an Express view engine wrapper for Handlebars. Depending on usage, users of hbs may be vulnerable to a file disclosure vulnerability. There is currently no patch for this vulnerability. hbs mixes pure template data with engine configuration options through the Express rende...

CVE-2021-32822 File disclosure in hbs

The npm hbs package is an Express view engine wrapper for Handlebars. Depending on usage, users of hbs may be vulnerable to a file disclosure vulnerability. There is currently no patch for this vulnerability. hbs mixes pure template data with engine configuration options through the Express rende...