CVE-2026-27125
MEDIUM SEVERITYCVSS Score & Metrics
Base Score
6.8 / 10
Vector String
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Vulnerability Description
svelte performance oriented web framework. Prior to 5.51.5, in server-side rendering, attribute spreading on elements (e.g. <div {...attrs}>) 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 unexpected attributes to appear in SSR output or cause SSR to throw errors. Client-side rendering is not affected. This vulnerability is fixed in 5.51.5.
Vulnerability Details
Published Date
Last Modified
CWE ID
CWE-915
Source
GitHub
Vendor
npm
Product
svelte
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