| Titre | dmitryglhf mcp-url-downloader 0.1.0 Server-Side Request Forgery |
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| Description | mcp-url-downloader attempts to defend against SSRF by resolving the caller-supplied URL and blocking localhost, RFC1918, and link-local addresses. However, the protection is only applied to the original URL. The actual download code creates an httpx.AsyncClient(..., follow_redirects=True) and performs both HEAD and GET requests without validating the redirect targets.
As a result, an attacker can supply a publicly reachable URL they control that responds with 302 or 307 redirects to an internal resource such as http://127.0.0.1:8080/, http://x.x.x.x/latest/meta-data/, or another private service reachable from the host. The downloader will follow the redirect automatically and save the internal response body to disk.
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| La source | ⚠️ https://github.com/dmitryglhf/url-download-mcp/issues/2 |
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| Utilisateur | SmallW (UID 97245) |
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| Soumission | 10/04/2026 13:33 (il y a 6 mois) |
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| Modérer | 26/04/2026 22:12 (16 days later) |
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| Statut | Accepté |
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| Entrée VulDB | 359757 [dmitryglhf mcp-url-downloader server.py _validate_url_safe url élévation de privilèges] |
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| Points | 20 |
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