CVE-2026-44443 Lumiverse: Sign-up nonce race condition allows unauthorized account registration
An attacker can race a nonce validation window to register unauthorized accounts in the Lumiverse AI chat application.
- 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-2026-44443?
CVE-2026-44443 is a medium-severity vulnerability in prolix-oc Lumiverse, published on 26 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Lumiverse is a full-featured AI chat application. Prior to 0.9.7, consumeNonce() only checks that the module-level variable is set and unexpired. It does not validate any value from the incoming HTTP request or bind the nonce to the admin's session. If the admin's auth.api.signUpEmail() call fails before the before hook fires (e.g. BetterAuth rejects a duplicate email at the validation layer), the nonce is set but never consumed. Any POST /api/auth/sign-up/email request that arrives during the remaining window registers successfully regardless of who sent it. An attacker who can observe or predict when the admin is creating users (must be a dupplicate user) can race the 10-second window to register an unauthorized account. This vulnerability is fixed in 0.9.7.
Weakness: CWE-362
Which versions are affected by CVE-2026-44443?
How do I fix CVE-2026-44443?
No fix has been published for CVE-2026-44443 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-44443 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44443 exists.