CVE-2025-59414: Nuxt Client-Side Path Traversal in Nuxt Island Payload Revival

Severity: low (CVSS 3.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-09-17 · updated 2026-06-17
Weakness: CWE-22

Description

Nuxt is an open-source web development framework for Vue.js. Prior to 3.19.0 and 4.1.0, A client-side path traversal vulnerability in Nuxt's Island payload revival mechanism allowed attackers to manipulate client-side requests to different endpoints within the same application domain when specific prerendering conditions are met. The vulnerability occurs in the client-side payload revival process (revive-payload.client.ts) where Nuxt Islands are automatically fetched when encountering serialized __nuxt_island objects. During prerendering, if an API endpoint returns user-controlled data containing a crafted __nuxt_island object, he data gets serialized with devalue.stringify and stored in the prerendered page. When a client navigates to the prerendered page, devalue.parse deserializes the payload. The Island reviver attempts to fetch /__nuxt_island/${key}.json where key could contain path traversal sequences. Update to Nuxt 3.19.0+ or 4.1.0+.

Affected products

nuxt: from 3.6.0 before 3.19.0; from 4.0.0 before 4.1.0 — fixed in 3.19.0, 4.1.0

How to fix

Upgrade to a fixed version: nuxt 3.19.0, 4.1.0. Check the vendor advisory for mitigations.

References

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