XSS in Nuxt
CVE-2026-45669
Nuxt is an open-source web development framework for Vue.js. From versions 3.4.3 to before 3.21.6 and 4.0.0-alpha.1 to before 4.4.6, navigateTo() with external: true generates a server-side HTML redirect body containing a <meta http-equiv="refresh"> tag. The destination URL is only sanitized by replacing " with %22, leaving <, >, &, and ' unencoded. An attacker who can influence the URL passed to navigateTo(url, { external: true }) can break out of the content="…" attribute and inject arbitrary HTML/JavaScript that executes under the application's origin. This issue has been patched in versions 3.21.6 and 4.4.6.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (18.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 18.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Nuxt — versions >= 3.4.3, < 3.21.6, >= 4.0.0-alpha.1, < 4.4.6
Weakness classification (CWE)
References
- github.com/nuxt/nuxt/pull/35052 (Issue Tracking)
- github.com/nuxt/nuxt/security/advisories/GHSA-fx6j-w5w5-h468 (Exploit, Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-45669?
- CVE-2026-45669 is a medium-severity vulnerability in Nuxt, classified under Improper Neutralization of Script in Attributes in a Web Page. CVSS score: 5.4/10. Published 2026-06-12.
- How severe is CVE-2026-45669?
- Medium severity. CVSS v3 base score is 5.4 out of 10.