Vulnerability · Published Mar 18, 2026 · Assigned by GitHub_M
CVE-2026-32944Parse Server crash via deeply nested query condition operators
High 8.7
In plain English
A high-severity security flaw in parse-server from parse-community. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.21 and 8.6.45, an unauthenticated attacker can crash the Parse Server process by sending a single request with deeply nested query condition operators. This terminates the server and denies service to all connected clients. Starting in version 9.6.0-alpha.21 and 8.6.45, a depth limit for query condition operator nesting has been added via the `requestComplexity.queryDepth` server option. The option is disabled by default to avoid a breaking change. To mitigate, upgrade and set the option to a value appropriate for your app. No known workarounds are available.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | parse-server | 9.6.0-alpha.21 | GHSA-9xp9-j92r-p88v |
| npm | parse-server | 8.6.45 | GHSA-9xp9-j92r-p88v |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| parse-community | parse-server | >= 9.0.0, < 9.6.0-alpha.21< 8.6.45 |
Weakness: CWE-674 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
References
- https://github.com/parse-community/parse-server/security/advisories/GHSA-9xp9-j92r-p88v x_refsource_CONFIRM
- https://github.com/parse-community/parse-server/pull/10202 x_refsource_MISC
- https://github.com/parse-community/parse-server/pull/10203 x_refsource_MISC