Timing Attack Affecting parse-server package, versions <8.6.74>=9.0.0-alpha.1 <9.8.0-alpha.6
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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Test your applications- Snyk IDSNYK-JS-PARSESERVER-15928859
- published8 Apr 2026
- disclosed8 Apr 2026
- creditUnknown
Introduced: 8 Apr 2026
NewCVE-2026-39321 (opens in a new tab)How to fix?
Upgrade parse-server to version 8.6.74, 9.8.0-alpha.6 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 Timing Attack via the login endpoint. An attacker can determine whether a username or email exists in the database by measuring response times for login attempts. This is possible because the server responds faster when a user does not exist and slower when a user exists but the password is incorrect, due to the presence or absence of a bcrypt comparison.