| Titolo | a2ui-project a2ui V1.0 CWE-918 |
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| Descrizione | The FileResolver is designed with security configuration options (allowed_hosts, allowed_mime_types, magic-byte verification, size and concurrency limits). However, allowed_hosts=None is the default, and in that mode the resolver performs an httpx GET on any http(s) URL supplied via the client-controlled fileId (or an LLM-initiated tool call), following redirects. The redirect-host check only runs when an allowlist is configured, and the connection is already made before any check — leaving a blind-request window and a DNS-rebinding TOCTOU (validation and connection resolve the hostname independently). |
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| Fonte | ⚠️ https://github.com/a2ui-project/a2ui/issues/2295 |
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| Utente | colorfullbz (UID 86308) |
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| Sottomissione | 17/08/2026 15:29 (1 mese fa) |
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| Moderazione | 15/09/2026 20:29 (29 days later) |
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| Stato | Accettato |
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| Voce VulDB | 404460 [a2ui-project a2ui fino a 0.10.7 FileResolver file_resolver.py httpx.get escalationi di privilegi] |
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| Punti | 20 |
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