CVE-2026-72584 fastschema - TOCTOU Race Condition Bypasses OTP Attempt Limit in Account Recovery
An attacker can bypass OTP attempt limits via a race condition to brute-force account recovery codes, potentially taking over user accounts.
- 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-2026-72584?
CVE-2026-72584 is a high-severity vulnerability in fastschema, published on 10 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A time-of-check/time-of-use (TOCTOU) race condition in fastschema through v0.15.1 allows an unauthenticated remote attacker to bypass the OTP attempt limit on the account recovery flow, enabling brute-force attacks on 6-digit OTP codes.
Weakness: CWE-367
Which versions are affected by CVE-2026-72584?
How do I fix CVE-2026-72584?
No fix has been published for CVE-2026-72584 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-72584 being exploited?
There is no known exploitation of CVE-2026-72584 in the wild and no public exploit code.
Sources
Also known as GHSA-qm6j-5qpg-x2x4.