CVE-2026-40585 blueprintUE: Password Reset Tokens Have No Expiry Window
Attackers can use indefinitely valid password reset tokens to take over user accounts in blueprintUE self-hosted editions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-40585?
CVE-2026-40585 is a high-severity vulnerability in blueprintue-self-hosted-edition, published on 21 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
blueprintUE is a tool to help Unreal Engine developers. Prior to 4.2.0, when a password reset is initiated, a 128-character CSPRNG token is generated and stored alongside a password_reset_at timestamp. However, the token redemption function findUserIDFromEmailAndToken() queries only for a matching email + password_reset token pair — it does not check whether the password_reset_at timestamp has elapsed any maximum window. A generated reset token is valid indefinitely until it is explicitly consumed or overwritten by a subsequent reset request. This vulnerability is fixed in 4.2.0.
Weakness: CWE-640
Which versions are affected by CVE-2026-40585?
How do I fix CVE-2026-40585?
No fix has been published for CVE-2026-40585 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-40585 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40585 exists.
Sources
Also known as GHSA-qr65-6vp8-whjf.