XSS in Nuxt
CVE-2026-56698
Nuxt versions 4.0.0 before 4.4.7 and 3.x before 3.21.7 fail to validate script-capable URLs in the navigateTo open option, allowing client-side script execution. Attackers can supply javascript: URLs through the open parameter to execute arbitrary scripts in the application's origin when user-controlled input is passed to navigateTo.
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: 0.004 (33.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 33.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · 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-c9cv-mq2m-ppp3 (vendor-advisory, Third Party Advisory)
- github.com/nuxt/nuxt/commit/3394716d4a913cba904b028df5338f2aead50032 (Patch, patch)
- github.com/nuxt/nuxt/commit/62fc32eddf648b00a3890141e0235d2a222b024d (Patch, patch)
- www.vulncheck.com/advisories/nuxt-cross-site-scripting-via-navigateto-open-opti… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-56698?
- CVE-2026-56698 is a medium-severity vulnerability in Nuxt, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-06-22.
- How severe is CVE-2026-56698?
- Medium severity. CVSS v3 base score is 6.1 out of 10.