Regresión: el nuevo límite de velocidad de check_username puede bloquear el flujo de registro normal

sam · 10 Septiembre, 2026 06:48

@keegan fusionó esto hace 2 días

github.com/discourse/discourse

FIX: Stop `check_username` rate limit from blocking signup (#43316)

main ← fix-check-username-rate-limit

merged 01:10PM - 08 Sep 26 UTC

keegangeorge

+87 -27

**Previously**, `check_username` allowed 10 requests per minute per IP and surfa…ced the "slow down" error inline, so a few username edits during signup (or every keystroke on the username preference page, which had no debounce) could block the form. Anonymous callers could also probe username existence on sites where registration is closed. **In this update**, the limit is raised to 60 per minute and the endpoint fails open when throttled, matching `check_email`, since `create` re-validates on submit. Anonymous requests are refused when new registrations are disabled or DiscourseConnect is enabled, and the username preference input is debounced with a stale-response guard. | Before | After | | --- | --- | | ![before](https://github.com/user-attachments/assets/3a9d613f-fbc8-4af7-94f9-9bb77b027309) | ![after](https://github.com/user-attachments/assets/60da2eec-d98d-4a3e-a0f6-153793c4d7b4) |

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Username Not Available when signing up twice, first incompletely Support	8	2375	22 Junio 2018
Username check at account creation doesn't handle CaSe properly Bug	1	866	31 Agosto 2016
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Regresión: el nuevo límite de velocidad de check_username puede bloquear el flujo de registro normal

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