blueprintue blueprintue-self-hosted-edition up to 4.1.x Password Change session expiration

Summaryinfo

A vulnerability labeled as problematic has been found in blueprintue blueprintue-self-hosted-edition up to 4.1.x. Impacted is an unknown function of the component Password Change Handler. Such manipulation leads to session expiration. This vulnerability is referenced as CVE-2026-40587. It is possible to launch the attack remotely. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in blueprintue blueprintue-self-hosted-edition up to 4.1.x. It has been rated as problematic. Affected by this issue is an unknown part of the component Password Change Handler. The manipulation with an unknown input leads to a session expiration vulnerability. Using CWE to declare the problem leads to CWE-613. According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization." Impacted is confidentiality, integrity, and availability. CVE summarizes:

blueprintUE is a tool to help Unreal Engine developers. Prior to 4.2.0, when a user changes their password via the profile edit page, or when a password reset is completed via the reset link, neither operation invalidates existing authenticated sessions for that user. A server-side session store associates userID → session; the current password change/reset flow updates only the password column in the users table and does not destroy or mark invalid any active sessions. As a result, an attacker who has already compromised a session retains full access to the account indefinitely — even after the legitimate user has detected the intrusion and changed their password — until the session's natural expiry time (configured as SESSION_GC_MAXLIFETIME, defaulting to 86400 seconds / 24 hours, with SESSION_LIFETIME=0 meaning persistent until browser close or GC, whichever is later). This vulnerability is fixed in 4.2.0.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-40587 since 04/14/2026. The exploitation is known to be easy. The attack may be launched remotely. The exploitation requires an enhanced level of successful authentication. The technical details are unknown and an exploit is not available.

Upgrading to version 4.2.0 eliminates this vulnerability.

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Productinfo

Vendor

• blueprintue

Name

• blueprintue-self-hosted-edition

Version

• 4.0
• 4.1

Website

• Product: https://github.com/blueprintue/blueprintue-self-hosted-edition/

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