CVE-2026-72584

HIGH 7.4

fastschema - TOCTOU Race Condition Bypasses OTP Attempt Limit in Account Recovery

CVSS Score

7.4

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-367
Vendor	fastschema
Product	fastschema
Published	Aug 10, 2026
Last Updated	Aug 10, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Affected Versions

fastschema / fastschema

0 ≤ 0.15.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/fastschema/fastschema github.com: https://github.com/fastschema/fastschema/blob/main/pkg/auth/local.go

Credits

Komiljon Ayubov