Vulnerability · Published Mar 31, 2026 · Assigned by GitHub_M
CVE-2026-34373Parse Server: GraphQL API endpoint ignores CORS origin restriction
Medium 5.3
In plain English
A medium-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 0.2% (higher than 11% 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 versions 8.6.66 and 9.7.0-alpha.10, the GraphQL API endpoint does not respect the allowOrigin server option and unconditionally allows cross-origin requests from any website. This bypasses origin restrictions that operators configure to control which websites can interact with the Parse Server API. The REST API correctly enforces the configured allowOrigin restriction. This issue has been patched in versions 8.6.66 and 9.7.0-alpha.10.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | parse-server | 9.7.0-alpha.10 | GHSA-q3p6-g7c4-829c |
| npm | parse-server | 8.6.66 | GHSA-q3p6-g7c4-829c |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| parse-community | parse-server | < 8.6.66>= 9.0.0, < 9.7.0-alpha.10 |
Weakness: CWE-346 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N
References
- https://github.com/parse-community/parse-server/security/advisories/GHSA-q3p6-g7c4-829c x_refsource_CONFIRM
- https://github.com/parse-community/parse-server/pull/10334 x_refsource_MISC
- https://github.com/parse-community/parse-server/pull/10335 x_refsource_MISC
- https://github.com/parse-community/parse-server/commit/0347641507891d0013ec57f7c10f012064f41263 x_refsource_MISC
- https://github.com/parse-community/parse-server/commit/4dd0d3d8be1c39664c74ad10bb0abaa76bc41203 x_refsource_MISC