Vite is a frontend tooling framework primarily used in the development and bundling of JavaScript applications. It is employed by developers worldwide to efficiently create modern web applications. Due to its rapid build times and hot module replacement feature, Vite is particularly popular for projects that require frequent iteration and quick feedback loops. The framework supports a wide variety of plugins and is adaptable to different development environments, making it a versatile tool for frontend developers. This flexibility, combined with its performance benefits, has made Vite a preferred choice for many in the web development community. Organizations aim to leverage Vite to streamline development processes, especially for large-scale projects with diverse frontend requirements.
The vulnerability identified in Vite pertains to the ability to bypass the server's local file inclusion restrictions. This specific issue arises in situations where the Vite dev server is exposed to the network using specific configurations. Local File Inclusion (LFI) vulnerabilities can allow attackers to access restricted files on the server, which may contain sensitive information. The exploitation involves manipulating path requests to bypass security checks using crafted URL patterns. This vulnerability is mainly a concern for applications that are improperly configured, but it highlights a notable risk in how Vite handles file requests. Addressing this problem is critical to prevent unauthorized access to sensitive server files.
In technical terms, the vulnerability involves appending query parameters like ?.svg' or ?.wasm?init' to a file request to bypass security restrictions. The server.fs.deny restriction could be circumvented, allowing malicious file requests. However, for the exploit to succeed, the file accessed must be smaller than a specified inline limit, which is typically set at 4kB. Moreover, the attack vector is limited to specific configurations where Vite's dev server is exposed to the network. This vulnerability primarily exploits flaws in the handling of URLs and server configurations, representing a significant risk if not properly mitigated.
When this vulnerability is exploited, malicious actors could access sensitive files on the server, such as password files or configuration data. The implications include unauthorized data access, disclosure of sensitive information, and potentially further exploitation if other vulnerabilities are present. The damage could extend to data breaches and unauthorized access, leading to broader security issues within the affected systems. Thus, timely remediation measures are vital to safeguard against possible data leaks and unauthorized access.
REFERENCES
- https://github.com/advisories/GHSA-xcj6-pq6g-qj4x
- https://github.com/vitejs/vite/blob/037f801075ec35bb6e52145d659f71a23813c48f/packages/vite/src/node/plugins/asset.ts#L285-L290
- https://github.com/vitejs/vite/commit/62d7e81ee189d65899bb65f3263ddbd85247b647
- https://github.com/vitejs/vite/security/advisories/GHSA-xcj6-pq6g-qj4x
- https://nvd.nist.gov/vuln/detail/CVE-2025-31486
- Update Vite to version 4.5.12, 5.4.17, 6.0.14, 6.1.4, 6.2.5, or later to patch the vulnerability.
- Ensure the Vite dev server is not exposed to the network using --host or server.host configuration unless necessary.
- Implement network access controls to restrict exposure of the dev server to trusted parties only.
- Regularly audit and review server configurations to detect and remediate security misconfigurations.
- Monitor access logs for any suspicious activities indicative of exploitation attempts.
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