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 , an Express view engine wrapping Handlebars, has a cross-site scripting vulnerability in its registerAsyncHelper API. An async helper returns an opaque placeholder during the first render pass, so Handlebars' double-brace escaping applies only to the placeholder. After rendering, hbs substit...

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 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...