# CVE-2026-40587

> Vulnerability · severity: **MEDIUM** (CVSS 6.5).

## Description

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.

## Key facts

- **CVE ID:** CVE-2026-40587
- **Published:** 2026-04-21
- **CVSS severity:** MEDIUM
- **CVSS base score:** 6.5
- **CWE codes:** CWE-613

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-40587

## Citation

> AI Analytics. CVE-2026-40587. Retrieved 2026-07-10 from https://api.ai-analytics.org/cve/CVE-2026-40587. Derived from NIST NVD. Licensed CC0.

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