Vulnerability Description
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.20 and 8.6.44, an attacker can bypass the default request keyword denylist protection and the class-level permission for adding fields by sending a crafted request that exploits prototype pollution in the deep copy mechanism. This allows injecting fields into class schemas that have field addition locked down, and can cause permanent schema type conflicts that cannot be resolved even with the master key. In 9.6.0-alpha.20 and 8.6.44, the vulnerable third-party deep copy library has been replaced with a built-in deep clone mechanism that handles prototype properties safely, allowing the existing denylist check to correctly detect and reject the prohibited keyword. No known workarounds are available.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Parseplatform | Parse-Server | < 8.6.44 |
Related Weaknesses (CWE)
References
- https://github.com/parse-community/parse-server/pull/10200Issue Tracking
- https://github.com/parse-community/parse-server/pull/10201Issue Tracking
- https://github.com/parse-community/parse-server/security/advisories/GHSA-9ccr-fpVendor Advisory
FAQ
What is CVE-2026-32878?
CVE-2026-32878 is a vulnerability with a CVSS score of 7.5 (HIGH). Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.20 and 8.6.44, an attacker can bypass the default request keyword denylist ...
How severe is CVE-2026-32878?
CVE-2026-32878 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-32878?
Check the references section above for vendor advisories and patch information. Affected products include: Parseplatform Parse-Server.