CVE-2026-40588
HIGHDescription
blueprintUE is a tool to help Unreal Engine developers. Prior to 4.2.0, the password change form at /profile/{slug}/edit/ does not include a current_password field and does not verify the user's existing password before accepting a new one. Any attacker who obtains a valid authenticated session — through XSS exploitation, session sidejacking over HTTP, physical access to a logged-in browser, or a stolen "remember me" cookie — can immediately change the account password without knowing the original credential, resulting in permanent account takeover. This vulnerability is fixed in 4.2.0.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Exploit Intelligence
Low risk: more likely to be exploited than 12% of all known CVEs.
References
Related Vulnerabilities
Other CWE-620 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2024-20419 | Critical | 10.0 | 81% | - | Fix |
| CVE-2025-4322 | Critical | 9.8 | 19% | - | - |
| CVE-2024-48887 | Critical | 9.8 | 15% | - | Fix |
| CVE-2024-33699 | Critical | 9.9 | 11% | - | - |
| CVE-2020-7378 | Critical | 9.1 | 2.6% | - | - |
| CVE-2024-12824 | Critical | 9.8 | 2.3% | - | - |
Common questions
How do I fix CVE-2026-40588?
No published fix for CVE-2026-40588 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2026-40588 being actively exploited?
Not that we know of. CVE-2026-40588 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.21% is the estimated probability that it will be exploited in the next 30 days. That is higher than 12% of all scored CVEs.
How severe is CVE-2026-40588?
CVE-2026-40588 has a CVSS v3 base score of 8.1, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-22.