Vulnerability in Nuxt
CVE-2026-120309
Nuxt from 4.6.0 before 4.6.2 contains a route parameter confusion vulnerability in getRouterParam and getRouterParams that lets attackers return a parameter value different from the one h3 matched by sending paths containing an encoded question mark (%3F). Attackers can craft requests where authorization checks use the Nuxt helper value while resource selection uses event.context.params, allowing access to unauthorized resources.
Published .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/nuxt/nuxt/security/advisories/GHSA-w7gw-66vg-99gq (vendor-advisory)
- www.vulncheck.com/advisories/nuxt-4.6.0-before-4.6.2-route-param-confusion-via-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-120309?
- CVE-2026-120309 is a low-severity vulnerability in Nuxt, classified under CWE-436. CVSS score: 3.7/10. Published 2026-11-02.
- How severe is CVE-2026-120309?
- Low severity. CVSS v3 base score is 3.7 out of 10.