CVE-2026-128123
SvelteKit: `@sveltejs/adapter-node` crashes when proxying certain requests via `fetch`
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.
INFO
Published Date :
Nov. 13, 2026, 7:54 p.m.
Last Modified :
Nov. 13, 2026, 7:54 p.m.
Remotely Exploit :
No
Source :
GitHub_M
Affected Products
The following products are affected by CVE-2026-128123
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update @sveltejs/adapter-node to version 5.5.8 or 6.0.1.
- Deploy the updated application.
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The following list is the news that have been mention
CVE-2026-128123 vulnerability anywhere in the article.