CVE-2026-122138
BlueprintUE Self-Hosted Edition 4.2.0 before 4.3.4 contains a login rate limit bypass vulnerability…
- Risk score
- 42/100
- CVSS
- 5.3 v3.1
- Published
- 4 Nov 2026
Open in the live forecast Today's forecast
What to know
- What it is
- BlueprintUE Self-Hosted Edition 4.2.0 before 4.3.4 contains a login rate limit bypass vulnerability in LoginMiddleware.php that keys failed-login counters on case-sensitive usernames. Unauthenticated attackers can vary username casing against case-insensitive MySQL lookups to get extra attempts and brute-force passwor…
- Affected
- See advisory
- Fix
- Upgrade the product to 4.3.4 or later.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 5.3 medium
- On your watchlist: php
References
- https://github.com/blueprintue/blueprintue-self-hosted-edition/blob/v4.3.3/app/middlewares/LoginMiddleware.php#L119-L158
- https://github.com/blueprintue/blueprintue-self-hosted-edition/commit/bd4af38d2f7d499be23fc4106f93980a1348ddd7
- https://github.com/blueprintue/blueprintue-self-hosted-edition/pull/267
- https://github.com/blueprintue/blueprintue-self-hosted-edition/releases/tag/v4.3.4
- https://github.com/blueprintue/blueprintue-self-hosted-edition/security/advisories/GHSA-773r-585g-6vc3
- https://www.vulncheck.com/advisories/blueprintue-self-hosted-edition-4.2.0-before-4.3.4-login-rate-limit-bypass
Original description
BlueprintUE Self-Hosted Edition 4.2.0 before 4.3.4 contains a login rate limit bypass vulnerability in LoginMiddleware.php that keys failed-login counters on case-sensitive usernames. Unauthenticated attackers can vary username casing against case-insensitive MySQL lookups to get extra attempts and brute-force passwords past the per-account lockout.
Last activity 4 Nov 2026. Patch Forecast updates every hour.