svelte performance oriented web framework. Prior to 5.51.5, when using <svelte:element this={tag}> in…
Historical advisory recorded 25 Oct 2026 06:17:28 UTC. Read the latest advisory.
nvd · CVE-2026-27122
Publishedsvelte performance oriented web framework. Prior to 5.51.5, when using <svelte:element this={tag}> in server-side rendering, the provided tag name is not validated or sanitized before being emitted into the HTML output. If the tag string contains unexpected characters, it can result in HTML injection in the SSR output. Client-side rendering is not affected. This vulnerability is fixed in 5.51.5.
Read the publisher's advisoryAffected versions, risk and source history
nvd · CVE-2026-27122
PublishedNVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.
Source analysis status: Analyzed
Weakness classifications: CWE-79
Original publisher date fields
published: 2026-02-20T23:16:02.640
lastModified: 2026-06-17T10:26:42.403
1 source CPE criteria · context only
- cpe:2.3:a:svelte:svelte:*:*:*:*:*:node.js:*:*
The original JSON retains the logical configuration operators, exclusions and version bounds.
No normalized affected-package data is projected for this source revision. The original publisher record may contain additional product and version evidence; this does not establish that a package is unaffected.
Original source record · Cite this exact observation · Complete original publisher JSON