XSS in Nuxt
CVE-2026-56317
Nuxt before 4.4.7 (and the 3.x branch before 3.21.7) contains a cross-site scripting vulnerability in the NoScript component that writes slot content to innerHTML without escaping. Attackers can inject malicious scripts through untrusted data in NoScript slots, such as route.query parameters, which execute in the document context when the noscript tag is implicitly closed by script tags.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (25.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 25.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Nuxt — versions 4.0.0, 4.4.7, 0
Weakness classification (CWE)
References
- github.com/nuxt/nuxt/security/advisories/GHSA-m3q2-p4fw-w38m (vendor-advisory, Patch, Mitigation, Vendor Advisory)
- github.com/nuxt/nuxt/commit/4b054e9d95f8daf366cb144b52782047c511a66e (Patch, patch)
- github.com/nuxt/nuxt/commit/7fea9fd687f1dacbfb63db5fae5839896b017a0e (Patch, patch)
- www.vulncheck.com/advisories/nuxt-cross-site-scripting-via-noscript-component-s… (Patch, Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-56317?
- CVE-2026-56317 is a medium-severity vulnerability in Nuxt, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-06-20.
- How severe is CVE-2026-56317?
- Medium severity. CVSS v3 base score is 6.1 out of 10.