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.19 and 8.6.43, a remote attacker can crash the Parse Server by subscribing to a LiveQuery with an invalid regular expression pattern. The server process terminates when the invalid pattern reaches the regex engine during subscription matching, causing denial of service for all connected clients. The fix in 9.6.0-alpha.19 and 8.6.43 validates regular expression patterns at subscription time, rejecting invalid patterns before they are stored. Additionally, a defense-in-depth try-catch prevents any subscription matching error from crashing the server process. As a workaround, disable LiveQuery if it is not needed.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Parseplatform | Parse-Server | < 8.6.43 |
Related Weaknesses (CWE)
References
- https://github.com/parse-community/parse-server/pull/10197Issue Tracking
- https://github.com/parse-community/parse-server/pull/10199Issue Tracking
- https://github.com/parse-community/parse-server/security/advisories/GHSA-827p-g5Vendor Advisory
FAQ
What is CVE-2026-32770?
CVE-2026-32770 is a vulnerability with a CVSS score of 5.9 (MEDIUM). 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.19 and 8.6.43, a remote attacker can crash the Parse Server by subscribing ...
How severe is CVE-2026-32770?
CVE-2026-32770 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-32770?
Check the references section above for vendor advisories and patch information. Affected products include: Parseplatform Parse-Server.