CVE-2026-40588 blueprintUE: Authenticated Password Change Does Not Verify Current Password
Authenticated attackers can change account passwords without verifying the current password, leading to permanent account takeover in blueprintUE.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-40588?
CVE-2026-40588 is a high-severity vulnerability in blueprintue-self-hosted-edition, published on 21 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-620
Which versions are affected by CVE-2026-40588?
How do I fix CVE-2026-40588?
No fix has been published for CVE-2026-40588 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-40588 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40588 exists.
Sources
Also known as GHSA-73f2-p9jr-m44x.