Cross-site Scripting (XSS)

Overview astro is an Astro is a modern site builder with web best practices, performance, and DX front-of-mind. Affected versions of this package are vulnerable to Cross-site Scripting XSS via the addAttribute function, which interpolates unescaped object keys as HTML attribute names when spreadi...

Cross-site Scripting (XSS)

Overview svelte is a package for building web applications. Affected versions of this package are vulnerable to Cross-site Scripting XSS in the handling of attribute spreading and dynamic name attributes within form elements. An attacker can inject malicious scripts by manipulating both the sprea...

Svelte Vulnerable to XSS via DOM Clobbering of Internal Framework State

Svelte was vulnerable to DOM clobbering of its internal framework state on elements, potentially leading to XSS attacks. You are vulnerable if all of the following is true: - you are using attribute spreading on a form element - you are using attribute spreading or allow a dynamic value for the...

GHSA-RCQX-6Q8C-2C42 Svelte Vulnerable to XSS via DOM Clobbering of Internal Framework State

Svelte was vulnerable to DOM clobbering of its internal framework state on elements, potentially leading to XSS attacks. You are vulnerable if all of the following is true: - you are using attribute spreading on a form element - you are using attribute spreading or allow a dynamic value for the...

Cross-site Scripting (XSS)

Overview org.webjars.npm:svelte is a package for building web applications. Affected versions of this package are vulnerable to Cross-site Scripting XSS in the handling of attribute spreading and dynamic name attributes within form elements. An attacker can inject malicious scripts by manipulatin...

CVE-2026-27125

svelte performance oriented web framework. Prior to 5.51.5, in server-side rendering, attribute spreading on elements e.g. enumerates inherited properties from the object's prototype chain rather than only own properties. In environments where Object.prototype has already been polluted — a...

CVE-2026-27125 Svelte SSR attribute spreading includes inherited properties from prototype chain

svelte performance oriented web framework. Prior to 5.51.5, in server-side rendering, attribute spreading on elements e.g. enumerates inherited properties from the object's prototype chain rather than only own properties. In environments where Object.prototype has already been polluted — a...

CVE-2026-27125 Svelte SSR attribute spreading includes inherited properties from prototype chain

svelte performance oriented web framework. Prior to 5.51.5, in server-side rendering, attribute spreading on elements e.g. enumerates inherited properties from the object's prototype chain rather than only own properties. In environments where Object.prototype has already been polluted — a...

CVE-2026-27125

svelte performance oriented web framework. Prior to 5.51.5, in server-side rendering, attribute spreading on elements e.g. enumerates inherited properties from the object's prototype chain rather than only own properties. In environments where Object.prototype has already been polluted — a...

CVE-2026-27125 Svelte SSR attribute spreading includes inherited properties from prototype chain

svelte performance oriented web framework. Prior to 5.51.5, in server-side rendering, attribute spreading on elements e.g. enumerates inherited properties from the object's prototype chain rather than only own properties. In environments where Object.prototype has already been polluted — a...

CVE-2026-27125

Svelte SSR vulnerability CVE-2026-27125 affects the framework prior to version 5.51.5 where attribute spreading () enumerates inherited properties from the prototype chain, potentially leaking attributes or causing SSR failures when Object.prototype is polluted. Client-side rendering is unaffecte...

PT-2026-21307

svelte performance oriented web framework. Prior to 5.51.5, in server-side rendering, attribute spreading on elements e.g. enumerates inherited properties from the object's prototype chain rather than only own properties. In environments where Object.prototype has already been polluted — a...

Improperly Controlled Modification of Dynamically-Determined Object Attributes

Overview org.webjars.npm:svelte is a package for building web applications. Affected versions of this package are vulnerable to Improperly Controlled Modification of Dynamically-Determined Object Attributes in server-side rendering when attribute spreading is performed on elements. An attacker ca...

Improperly Controlled Modification of Dynamically-Determined Object Attributes

Overview svelte is a package for building web applications. Affected versions of this package are vulnerable to Improperly Controlled Modification of Dynamically-Determined Object Attributes in server-side rendering when attribute spreading is performed on elements. An attacker can inject...

Svelte SSR attribute spreading includes inherited properties from prototype chain

In server-side rendering, attribute spreading on elements e.g. enumerates inherited properties from the object's prototype chain rather than only own properties. In environments where Object.prototype has already been polluted — a precondition outside of Svelte's control — this can cause unexpect...

GHSA-CRPF-4HRX-3JRP Svelte SSR attribute spreading includes inherited properties from prototype chain

In server-side rendering, attribute spreading on elements e.g. enumerates inherited properties from the object's prototype chain rather than only own properties. In environments where Object.prototype has already been polluted — a precondition outside of Svelte's control — this can cause unexpect...

PT-2026-21306

Name of the Vulnerable Software and Affected Versions Svelte versions prior to 5.51.5 Description Svelte is susceptible to cross-site scripting XSS during server-side rendering. Utilizing spread syntax with untrusted data can lead to the inclusion of event handler properties in the generated HTML...