CVE-2026-30965
CRITICAL
GHSA-6r2j-cxgf-495f
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Lifecycle Timeline
3Tags
Description
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.5.2-alpha.8 and 8.6.21, a vulnerability in Parse Server's query handling allows an authenticated or unauthenticated attacker to exfiltrate session tokens of other users by exploiting the redirectClassNameForKey query parameter. Exfiltrated session tokens can be used to take over user accounts. The vulnerability requires the attacker to be able to create or update an object with a new relation field, which depends on the Class-Level Permissions of at least one class. This vulnerability is fixed in 9.5.2-alpha.8 and 8.6.21.
Analysis
Parse Server has an incorrect authorization vulnerability enabling unauthorized data access across applications.
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Remediation
Within 24 hours: Inventory all Parse Server instances and assess exposure; implement network segmentation to restrict Parse Server access to essential services only. Within 7 days: Deploy Web Application Firewall (WAF) rules to block exploitation attempts; disable non-essential Parse Server features and API endpoints; enable enhanced logging and monitoring. …
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External POC / Exploit Code
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