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Gateway: harden trusted proxy X-Forwarded-For parsing (#22429)

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This commit is contained in:
Vincent Koc
2026-02-20 23:59:20 -05:00
committed by GitHub
parent 35be87b09b
commit 07039dc089
3 changed files with 16 additions and 2 deletions
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11
src/gateway/net.test.ts
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@@ -145,12 +145,21 @@ describe("resolveGatewayClientIp", () => {
it("returns forwarded client IP when the remote is a trusted proxy", () => {
const ip = resolveGatewayClientIp({
remoteAddr: "127.0.0.1",
forwardedFor: "10.0.0.2, 127.0.0.1",
forwardedFor: "127.0.0.1, 10.0.0.2",
trustedProxies: ["127.0.0.1"],
});
expect(ip).toBe("10.0.0.2");
});
it("does not trust the left-most X-Forwarded-For value when behind a trusted proxy", () => {
const ip = resolveGatewayClientIp({
remoteAddr: "127.0.0.1",
forwardedFor: "198.51.100.99, 10.0.0.9, 127.0.0.1",
trustedProxies: ["127.0.0.1"],
});
expect(ip).toBe("127.0.0.1");
});
it("fails closed when trusted proxy headers are missing", () => {
const ip = resolveGatewayClientIp({
remoteAddr: "127.0.0.1",