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fix(proxy): validate host against allowlist to prevent open redirect (fixes #65) #68

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Merged
ralyodio merged 1 commit into from
Jun 14, 2026
+4 −3
Merged

fix(proxy): validate host against allowlist to prevent open redirect (fixes #65) #68

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7 changes: 4 additions & 3 deletions apps/logicsrc-web/src/proxy.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -4,12 +4,13 @@ import type { NextRequest } from "next/server";
// Canonical host: 301 www.* to the bare apex domain over https, preserving
// path + query (e.g. https://www.logicsrc.com/foo -> https://logicsrc.com/foo).
// This is the Next 16 "proxy" (formerly middleware) entrypoint.
const ALLOWED_APEX = process.env.PUBLIC_DOMAIN || "logicsrc.com";

export function proxy(request: NextRequest): NextResponse {
const host = request.headers.get("host") ?? "";
if (host.startsWith("www.")) {
const apexHost = host.slice("www.".length);
if (host === `www.${ALLOWED_APEX}`) {
const { pathname, search } = request.nextUrl;
return NextResponse.redirect(`https://${apexHost}${pathname}${search}`, 301);
return NextResponse.redirect(`https://${ALLOWED_APEX}${pathname}${search}`, 301);
}
return NextResponse.next();
}
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