CVE-2026-122138mediumCWE-307

CVE-2026-122138: medium-severity vulnerability in blueprintue-self-hosted-edition

BlueprintUE Self-Hosted Edition 4.2.0 before 4.3.4 Login Rate Limit Bypass

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13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 6.3epss 0.3%
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.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Affected products
blueprintue · blueprintue-self-hosted-edition
Related CVEs — blueprintue-self-hosted-edition

In the same product, most dangerous first.

CVE-2026-40586HIGHblueprintUE: Login Endpoint Has No Rate Limiting, Lockout, or Brute-Force ProtectionEPSS 0.4%CVE-2026-122139MEDIUMblueprintUE Self-Hosted Edition before 4.3.3 Account Enumeration via Password ResetEPSS 0.3%CVE-2026-40588HIGHblueprintUE: Authenticated Password Change Does Not Verify Current PasswordEPSS 0.3%CVE-2026-40585HIGHblueprintUE: Password Reset Tokens Have No Expiry WindowEPSS 0.3%CVE-2026-40587MEDIUMblueprintUE: Active Sessions Are Not Invalidated After Password Change or ResetEPSS 0.2%CVE-2026-121735MEDIUMblueprintUE Self-Hosted Edition before 4.3.4 Non-Expiring Account Confirmation TokensEPSS 0.2%