Time-of-check Time-of-use (TOCTOU) Race Condition Affecting parse-server package, versions <8.6.60>=9.0.0-alpha.1 <9.6.0-alpha.54
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published25 Mar 2026
- disclosed24 Mar 2026
- creditSneh Patel
Introduced: 24 Mar 2026
NewCVE-2026-33624 (opens in a new tab)How to fix?
Upgrade parse-server to version 8.6.60, 9.6.0-alpha.54 or higher.
Overview
parse-server is a version of the Parse backend that can be deployed to any infrastructure that can run Node.js.
Affected versions of this package are vulnerable to Time-of-check Time-of-use (TOCTOU) Race Condition due to the single-use design of recovery codes. An attacker who obtains a user's password and a single MFA recovery code can repeatedly gain unauthorized access by sending concurrent requests with a valid password and a single recovery code, allowing the recovery code to be reused multiple times.