Missing Authentication for Critical Function Affecting parse-server package, versions <8.6.52>=9.0.0-alpha.1 <9.6.0-alpha.41
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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- published20 Mar 2026
- disclosed19 Mar 2026
- creditUnknown
Introduced: 19 Mar 2026
CVE-2026-33409 (opens in a new tab)How to fix?
Upgrade parse-server to version 8.6.52, 9.6.0-alpha.41 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 Missing Authentication for Critical Function due to the improper validation of third-party auth provider's credentials. An attacker can gain unauthorized access to user accounts by providing only the user's provider ID, bypassing credential verification. This is only exploitable if the server option allowExpiredAuthDataToken is set to true.