SvelteKit before 3.0.0 XSS via Cache-Control Header in Prerendered Pages
SvelteKit (@sveltejs/kit) before 3.0.0 contains a cross-site scripting vulnerability in prerendered pages because a cache-control header value set via setHeaders is inserted without escaping into a tag. An attacker who can influence that untrusted value at prerender time can break out of the content attribute and inject HTML or JavaScript that executes when users visit the page.
CVE-2026-114061
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-114061
kit
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "sveltejs",
"product": "kit",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "3.0.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "3.0.0",
"versionType": "semver"
}
],
"packageURL": "pkg:npm/%40sveltejs/kit",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-114061
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #44951 · Revision 1
- Added to Heist Feed
- Publisher date