blueprintUE is a tool to help Unreal Engine developers. Prior to 4.2.0, the login form handler performs no throttling of any kind. Failed authentication attempts are processed at full network speed with no IP-based rate limiting, no per-account attempt counter, no temporary lockout, no progressive delay (Tarpit), and no CAPTCHA challenge. An attacker can submit an unlimited number of credential guesses. The password policy (10+ characters, mixed case, digit, special character) reduces the effective keyspace but does not prevent dictionary attacks, credential stuffing from breached databases, or targeted attacks against known users with predictable passwords. This vulnerability is fixed in 4.2.0.
Metrics
Affected Vendors & Products
References
History
Wed, 22 Apr 2026 12:15:00 +0000
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Blueprintue
Blueprintue blueprintue-self-hosted-edition |
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Blueprintue
Blueprintue blueprintue-self-hosted-edition |
Wed, 22 Apr 2026 00:00:00 +0000
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ssvc
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Tue, 21 Apr 2026 17:15:00 +0000
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| Description | blueprintUE is a tool to help Unreal Engine developers. Prior to 4.2.0, the login form handler performs no throttling of any kind. Failed authentication attempts are processed at full network speed with no IP-based rate limiting, no per-account attempt counter, no temporary lockout, no progressive delay (Tarpit), and no CAPTCHA challenge. An attacker can submit an unlimited number of credential guesses. The password policy (10+ characters, mixed case, digit, special character) reduces the effective keyspace but does not prevent dictionary attacks, credential stuffing from breached databases, or targeted attacks against known users with predictable passwords. This vulnerability is fixed in 4.2.0. | |
| Title | blueprintUE: Login Endpoint Has No Rate Limiting, Lockout, or Brute-Force Protection | |
| Weaknesses | CWE-307 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-04-21T17:10:05.432Z
Updated: 2026-04-21T19:04:41.220Z
Reserved: 2026-04-14T13:24:29.476Z
Link: CVE-2026-40586
Updated: 2026-04-21T19:04:35.536Z
Status : Deferred
Published: 2026-04-21T17:16:56.523
Modified: 2026-04-22T21:16:27.863
Link: CVE-2026-40586
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