Regression: Neue check_username-Rate-Limit kann normalen Registrierungsprozess blockieren

sam · 10. September 2026 um 06:48

@keegan hat dies vor 2 Tagen zusammengeführt

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) |

Löst das dein Problem?

Thema		Antworten	Aufrufe
Include username on responses rate-limited by userid Feature	0	139	24. Juni 2024
Username Availability Check Stuck During Registration Product Support	0	138	16. September 2024
Username Not Available when signing up twice, first incompletely Product Support	8	2419	22. Juni 2018
Username check at account creation doesn't handle CaSe properly Bug	1	910	31. August 2016
Check_username api endpoint seems to not work correctly Product Support	1	1122	27. Februar 2018

Regression: Neue check_username-Rate-Limit kann normalen Registrierungsprozess blockieren

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