CVE-2026-32770

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.

The following products are affected by CVE-2026-32770 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-32770.

URL	Resource
https://github.com/parse-community/parse-server/pull/10197
https://github.com/parse-community/parse-server/pull/10199
https://github.com/parse-community/parse-server/security/advisories/GHSA-827p-g5x5-h86c