Vulnerability Description
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.70 and 9.7.0-alpha.18, an authenticated user with find class-level permission can bypass the protectedFields class-level permission setting on LiveQuery subscriptions. By sending a subscription with a $or, $and, or $nor operator value as a plain object with numeric keys and a length property (an "array-like" object) instead of an array, the protected-field guard is bypassed. The subscription event firing acts as a binary oracle, allowing the attacker to infer whether a protected field matches a given test value. This issue has been patched in versions 8.6.70 and 9.7.0-alpha.18.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Parseplatform | Parse-Server | < 8.6.70 |
Related Weaknesses (CWE)
References
- https://github.com/parse-community/parse-server/commit/f63fd1a3fe0a7c1c5fe809f01Patch
- https://github.com/parse-community/parse-server/commit/ffad0ec6b971ee0dd9545e1bfPatch
- https://github.com/parse-community/parse-server/pull/10350Issue TrackingPatch
- https://github.com/parse-community/parse-server/pull/10351Issue TrackingPatch
- https://github.com/parse-community/parse-server/security/advisories/GHSA-mmg8-87PatchVendor Advisory
FAQ
What is CVE-2026-34595?
CVE-2026-34595 is a vulnerability with a CVSS score of 4.3 (MEDIUM). Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.70 and 9.7.0-alpha.18, an authenticated user with find class-level permiss...
How severe is CVE-2026-34595?
CVE-2026-34595 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-34595?
Check the references section above for vendor advisories and patch information. Affected products include: Parseplatform Parse-Server.