Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Parseplatform | Parse-Server | < 8.6.21 |
Related Weaknesses (CWE)
References
- https://github.com/parse-community/parse-server/releases/tag/8.6.21ProductRelease Notes
- https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.8ProductRelease Notes
- https://github.com/parse-community/parse-server/security/advisories/GHSA-6r2j-cxVendor AdvisoryMitigation
FAQ
What is CVE-2026-30965?
CVE-2026-30965 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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 au...
How severe is CVE-2026-30965?
CVE-2026-30965 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-30965?
Check the references section above for vendor advisories and patch information. Affected products include: Parseplatform Parse-Server.