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

Quick assessment

Affected

nuxt nuxt

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Nuxt 4.6.0 至 4.6.2 版本（不含 4.6.2）存在路由参数混淆漏洞，该漏洞位于和函数中。攻击者可通过发送包含编码问号（%3F）的路径，使返回的参数值与 h3 实际匹配的值不一致。攻击者可构造特定请求，令授权检查使用 Nuxt 辅助函数提供的参数值，而资源选择则使用，从而绕过访问控制，获取未授权资源的访问权限。

CVSS 3.7 · Low EPSS 0.23% · P14 Updated Nov 02, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 4

Vendor	Product	Version Range	Status
nuxt	nuxt	`4.6.0< 4.6.2`	affected
		`4.6.2`	unaffected
		`4.6.0< 4.6.2`	affected
		`4.6.2`	unaffected

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Vulnerability Information

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Vulnerability Title

Nuxt 4.6.0 before 4.6.2 Route Param Confusion via getRouterParam

Source: CVE Program / CVE List V5

Vulnerability Description

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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

解释冲突

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
nuxt	nuxt	4.6.0 ~ 4.6.2	-
nuxt	nuxt	4.6.0 ~ 4.6.2	-

II. Public POCs for CVE-2026-120309

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-120309

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Other References for CVE-2026-120309 (2)

https://github.com/nuxt/nuxt/security/advisories/GHSA-w7gw-66vg-99gq vendor-advisory
https://www.vulncheck.com/advisories/nuxt-4.6.0-before-4.6.2-route-param-confusion-via-getrouterparam third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-120309

IV. Related Vulnerabilities

Same product: nuxt

Same vendor: nuxt

Same weakness: CWE-436