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Title: fix(auth): gate email-otp auto-signup behind DISABLE_EMAIL_SIGNUP by waleedlatif1 · Pull Request #5840 · simstudioai/sim · GitHub

Open Graph Title: fix(auth): gate email-otp auto-signup behind DISABLE_EMAIL_SIGNUP by waleedlatif1 · Pull Request #5840 · simstudioai/sim

X Title: fix(auth): gate email-otp auto-signup behind DISABLE_EMAIL_SIGNUP by waleedlatif1 · Pull Request #5840 · simstudioai/sim

Description: Summary `DISABLE_EMAIL_SIGNUP` only blocked the `/sign-up/email` path, but better-auth's email-otp plugin auto-registers any unknown email on `/sign-in/email-otp` — so new accounts could still be created with the flag set Wire the same flag into better-auth's native `disableSignUp` option on both `emailAndPassword` and the `emailOTP` plugin, and drop the now-redundant path-string check in the before-hook With `disableSignUp` set, the OTP plugin also skips sending sign-in codes to unknown emails (enumeration-safe) while existing users keep OTP sign-in, email/password sign-in, and the verify-email flow unchanged; social/SSO signup is unaffected Type of Change Bug fix Testing Verified against better-auth 1.6.13 source: unknown-email OTP sign-in rejects instead of creating a user; existing-user OTP sign-in, email/password sign-in, and email verification paths unchanged. Typecheck and lint pass. Checklist Code follows project style guidelines Self-reviewed my changes Tests added/updated and passing No new warnings introduced I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

Open Graph Description: Summary `DISABLE_EMAIL_SIGNUP` only blocked the `/sign-up/email` path, but better-auth's email-otp plugin auto-registers any unknown email on `/sign-in/email-otp` — so new accounts could still...

X Description: Summary `DISABLE_EMAIL_SIGNUP` only blocked the `/sign-up/email` path, but better-auth's email-otp plugin auto-registers any unknown email on `/sign-in/email-otp` — so new accounts could s...

Opengraph URL: https://github.com/simstudioai/sim/pull/5840

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a3421b4 fix(auth): gate email-otp auto-signup behind DISABLE_EMAIL_SIGNUP waleedlatif1 Jul 22, 2026 https://github.com/simstudioai/sim/pull/5840/commits/a3421b42730685d4338621d36efdc97e56f5d983
ba91922 fix(auth): also close otp auto-signup under DISABLE_REGISTRATION waleedlatif1 Jul 22, 2026 https://github.com/simstudioai/sim/pull/5840/commits/ba919229e076689c024930e3a3e2a0eeed2a6b1e
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