Fix double backslash open redirect (#1096)
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@ -87,7 +87,7 @@ class NextUrlSanitizer:
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return replaced
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else:
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return None
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if result.path and result.path[0] == "/":
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if result.path and result.path[0] == "/" and not result.path.startswith("//"):
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return result.path
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return None
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@ -27,6 +27,7 @@ def generate_sanitize_url_cases() -> List:
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["/auth", "/auth"],
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["/some/path", "/some/path"],
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["//somewhere.net", None],
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["//\\\\evil.com", None],
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]
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for domain in ALLOWED_REDIRECT_DOMAINS:
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cases.append([f"http://{domain}", f"http://{domain}"])
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