Incorrect Authorization Affecting parse-server package, versions <8.6.67>=9.0.0 <9.7.0-alpha.11
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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- published1 Apr 2026
- disclosed31 Mar 2026
- creditbugbunny-research
Introduced: 31 Mar 2026
NewCVE-2026-34532 (opens in a new tab)How to fix?
Upgrade parse-server to version 8.6.67, 9.7.0-alpha.11 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 Incorrect Authorization via the Cloud Function handler resolution process. An attacker can gain unauthorized access to protected functions by appending .prototype.constructor to the function name in the URL, which causes the validator access controls to be bypassed during prototype chain traversal. This allows invocation of functions intended to be restricted to authenticated or privileged users.
Workaround
This vulnerability can be mitigated by using arrow functions instead of the function keyword for Cloud Function handlers.