CVE-2026-122138 BlueprintUE Self-Hosted Edition 4.2.0 before 4.3.4 Login Rate Limit Bypass
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-122138?
CVE-2026-122138 is a medium-severity vulnerability in blueprintue-self-hosted-edition, published on 4 Nov 2026.
Official 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.
Weakness: CWE-307
Which versions are affected by CVE-2026-122138?
How do I fix CVE-2026-122138?
No fix has been published for CVE-2026-122138 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-122138 being exploited?
There is no known exploitation of CVE-2026-122138 in the wild and no public exploit code.
Sources
Also known as GHSA-3x4w-vq7f-5f76, GHSA-773r-585g-6vc3.