CVE-2026-122138

EUVD-2026-117092
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.3 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Common Weakness Enumeration
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