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fix(webapp): fix broken MFA by only committing one auth session set-cookie call #3104

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Merged
ericallam merged 2 commits into from
Feb 20, 2026
Merged

fix(webapp): fix broken MFA by only committing one auth session set-cookie call #3104

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e1ebfc3
fix(webapp): fix broken MFA by only committing one auth session set-c…
ericallam Feb 20, 2026
73737fb
Merge branch 'main' into ea-branch-121
0ski Feb 20, 2026
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9 changes: 4 additions & 5 deletions 9 apps/webapp/app/routes/login.mfa/route.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -20,7 +20,7 @@ import { InputOTP, InputOTPGroup, InputOTPSlot } from "~/components/primitives/I
import { Paragraph } from "~/components/primitives/Paragraph";
import { Spinner } from "~/components/primitives/Spinner";
import { authenticator } from "~/services/auth.server";
import { commitSession, getUserSession, sessionStorage } from "~/services/sessionStorage.server";
import { commitSession, getUserSession } from "~/services/sessionStorage.server";
import { getSession as getMessageSession } from "~/models/message.server";
import { MultiFactorAuthenticationService } from "~/services/mfa/multiFactorAuthentication.server";
import { redirectWithErrorMessage, redirectBackWithErrorMessage } from "~/models/message.server";
Expand Down Expand Up @@ -152,17 +152,16 @@ export async function action({ request }: ActionFunctionArgs) {
}

async function completeLogin(request: Request, session: Session, userId: string) {
// Create a new authenticated session
const authSession = await sessionStorage.getSession(request.headers.get("Cookie"));
authSession.set(authenticator.sessionKey, { userId });
// Set the auth key on the same session object to avoid conflicting Set-Cookie headers
// (both authSession and session share the same __session cookie name)
session.set(authenticator.sessionKey, { userId });

// Get the redirect URL and clean up pending MFA data
const redirectTo = session.get("pending-mfa-redirect-to") ?? "/";
session.unset("pending-mfa-user-id");
session.unset("pending-mfa-redirect-to");

const headers = new Headers();
headers.append("Set-Cookie", await sessionStorage.commitSession(authSession));
headers.append("Set-Cookie", await commitSession(session));

await trackAndClearReferralSource(request, userId, headers);
Expand Down
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