CVE-2026-32602 Homarr has a Race Condition in Invite Token Registration (TOCTOU)

Medium 4.2 Published 6 Apr 2026 Updated 6 Apr 2026

Attackers can create multiple user accounts from a single invite token due to a race condition in the registration endpoint, bypassing single-use restrictions.

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-2026-32602?

CVE-2026-32602 is a medium-severity vulnerability in homarr-labs homarr, published on 6 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Homarr is an open-source dashboard. Prior to 1.57.0, the user registration endpoint (/api/trpc/user.register) is vulnerable to a race condition that allows an attacker to create multiple user accounts from a single-use invite token. The registration flow performs three sequential database operations without a transaction: CHECK, CREATE, and DELETE. Because these operations are not atomic, concurrent requests can all pass the validation step (1) before any of them reaches the deletion step (3). This allows multiple accounts to be registered using a single invite token that was intended to be single-use. This vulnerability is fixed in 1.57.0.

Weakness: CWE-367

Which versions are affected by CVE-2026-32602?

It affects 1 product.

Products include Homarr Homarr.

How do I fix CVE-2026-32602?

No fix has been published for CVE-2026-32602 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-32602 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-32602 exists.

Sources

Also known as GHSA-vfw3-53q9-2hp8.