{"affected":[{"product":"kit","source":"CNA: GitHub_M","vendor":"sveltejs","versions":[{"status":"affected","version":">= 3.0.0-next.0, < 3.1.1"},{"status":"affected","version":"< 2.70.4"}]},{"product":"adapter-node","source":"CNA: GitHub_M","vendor":"@sveltejs","versions":[{"status":"affected","version":">= 5.5.7, < 5.5.8"},{"status":"affected","version":">= 6.0.0-next.0, < 6.0.1"}]}],"cveId":"CVE-2026-128123","cwes":["CWE-248"],"description":"SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. From version 5.5.7 until versions 5.5.8 and 6.0.1, , @sveltejs/adapter-node can attempt to add a header to an immutable request in a context that causes the server to crash, denying service to any other requests routed to that server. This issue is fixed in 5.5.8 and 6.0.1.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":5.9,"severity":"medium","source":"CNA: GitHub_M","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}],"modifiedAt":1794599645381,"publishedAt":1794599645381,"references":[{"source":"CNA: GitHub_M","tags":["x_refsource_CONFIRM"],"url":"https://github.com/sveltejs/kit/security/advisories/GHSA-rqw3-x7hx-mm3p"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/sveltejs/kit/pull/17620"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/sveltejs/kit/commit/04756a1f7a4f73e34f1934895340a46de84fc164"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/sveltejs/kit/commit/0a2e58cbccdd46cac20aa5af4e2edf17e0da11dd"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-node@5.5.8"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-node@6.0.1"}],"remediation":[],"revision":"c6b377317240fd37b05dfccb86383b99dbe4c8211293482b8a6a2c662987aabf","sources":[{"modifiedAt":1794599645381,"name":"CNA: GitHub_M","retrievedAt":1794600605390,"url":"https://www.cve.org/CVERecord?id=CVE-2026-128123"}],"ssvc":null,"status":"published","title":"SvelteKit: `@sveltejs/adapter-node` crashes when proxying certain requests via `fetch`","updatedAt":1794600605390}