# CVE-2026-120309: Nuxt 4.6.0 before 4.6.2 Route Param Confusion via getRouterParam

Status: published. Published: 2026-11-02. Updated: 2026-11-02.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- nuxt / nuxt (nuxt): ≥ 4.6.0; < 4.6.2 (affected, semver); 4.6.2 (unaffected, semver). Source: CNA: VulnCheck
- nuxt / nuxt (%40nuxt/nitro-server): ≥ 4.6.0; < 4.6.2 (affected, semver); 4.6.2 (unaffected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 6.3 (medium); CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 3.7 (low); CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-436

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/nuxt/nuxt/security/advisories/GHSA-w7gw-66vg-99gq (CNA: VulnCheck; vendor-advisory)

- https://www.vulncheck.com/advisories/nuxt-4.6.0-before-4.6.2-route-param-confusion-via-getrouterparam (CNA: VulnCheck; third-party-advisory)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-120309; retrieved 2026-11-02; source updated 2026-11-02

Revision: a32240470973251e52ee15a01bd4f50990b6916556e6e1e3039b7e619a16d7dc

Canonical: https://y2.dev/cve/CVE-2026-120309