Executive brief
Parse is a JavaScript SDK used to interact with Parse backend servers. A prototype pollution vulnerability in the state initialization function allows authenticated users to inject malicious properties that can cause denial of service or potentially affect application behavior across multiple instances.
Technical details
The vulnerability is a prototype pollution flaw (CWE-1321) in the SingleInstanceStateController.initializeState function of the Parse JavaScript SDK. An attacker with authentication credentials can craft a malicious payload that injects properties onto Object.prototype, affecting all JavaScript objects in the application. The attack vector requires network access and authentication. The primary impact is denial of service through resource exhaustion or unexpected application behavior. A fix is available in version 7.0.0-alpha.1, with the patch committed on 2025-10-14.
Affected products
- Parse Community Parse JavaScript SDK 0 through <7.0.0-alpha.1
Timeline
- 2025-09-24: disclosed: Advisory published on OSV and NVD
- 2025-10-14: patched: Fix committed to Parse-SDK-JS repository