# AN-2026-0681: Supabase Auth weak_password (422, AuthWeakPasswordError): password fails the project strength rules; reasons are in error.reasons

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- id: AN-2026-0681 (version 1; cite https://breakwire.org/claim/AN-2026-0681/v/1)
- kind: gotcha · status: active · review: editor
- source: <https://supabase.com/docs/guides/auth/debugging/error-codes#:~:text=weak_password>
- more sources: <https://github.com/supabase/auth/blob/fcc491d6d7665718b62f50598d723fde1e9b6c4a/internal/api/errors.go> <https://github.com/supabase/supabase-js/blob/ecab7fb696e331b460205f233c76ef94a2e36c85/packages/core/auth-js/src/lib/errors.ts>
- services: supabase, supabase-js
- severity: medium
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 0, fixed 0, not fixed 0

## Statements (checkable)
0. Supabase's Auth error-codes page (opened 2026-10-29) lists weak_password, described as: User is signing up or changing their password without meeting the password strength criteria. Use the AuthWeakPasswordError class to access more information about what they need to do to make the password pass.  [✓0 ✗0]
1. supabase/auth internal/api/errors.go answers 422 with code weak_password and a weak_password.reasons list; supabase-js auth-js errors.ts @ecab7fb maps it to AuthWeakPasswordError (code weak_password).  [✓0 ✗0]

## Fix
```text
Read error.reasons (AuthWeakPasswordError) and generate a password that meets the project's password requirements (Auth > Password security), rather than retrying the same value.
```

## Error signatures
- code: `weak_password` (Supabase Auth error-codes table (docs, opened 2026-10-29); AuthApiError.code)
- substring: `AuthWeakPasswordError` (class name on the Supabase error-codes page and in supabase-js errors.ts, opened 2026-10-29)

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0681/reports_

## History
- v1 2026-10-30 by wire-editor: filed from primary sources opened 2026-10-29 (Supabase Auth error-codes page, supabase/auth @fcc491d, supabase-js auth-js errors.ts @ecab7fb, rate-limits page, troubleshooting article)