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-2026-27121 Svelte affected by cross-site scripting via spread attributes in Svelte SSR

svelte performance oriented web framework. Versions of svelte prior to 5.51.5 are vulnerable to cross-site scripting XSS during server-side rendering. When using spread syntax to render attributes from untrusted data, event handler properties are included in the rendered HTML output. If an...

CVE-2026-27119 Svelte affected by XSS in SSR `<option>` element

svelte performance oriented web framework. From 5.39.3, element does not properly escape its content, potentially allowing HTML injection in the SSR output. Client-side rendering is not affected. This vulnerability is fixed in 5.51.5...

CVE-2026-27119 Svelte affected by XSS in SSR `<option>` element

svelte performance oriented web framework. From 5.39.3, element does not properly escape its content, potentially allowing HTML injection in the SSR output. Client-side rendering is not affected. This vulnerability is fixed in 5.51.5...

PT-2026-21305

Name of the Vulnerable Software and Affected Versions Svelte versions 5.39.3 through 5.51.4 Description Svelte is susceptible to a flaw where, under specific conditions, the server-side rendering of an element fails to properly escape its content. This can lead to potential HTML injection within...