CVE-2026-50008

Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. From version 9.8.0 to before version 9.9.1, the routeAllowList server option restricts external client access to a configured list of REST API routes. The check is only enforced as Express middleware against the outer HTTP request URL, so the /batch handler dispatches each sub-request to the internal router without re-running the allow-list check. An external caller whose outer route matches batch can issue batch sub-requests to any REST API route that the operator omitted from the allow-list. Authentication, ACL, CLP, and other inner-route authorization controls still apply — only the operator-configured route firewall is bypassed. This issue has been patched in version 9.9.1.

How to fix CVE-2026-50008

To remediate CVE-2026-50008, upgrade the affected package to a fixed version below.

• —upgrade to 9.9.1 or later
• —upgrade to 9.9.1-alpha.3 or later

Is CVE-2026-50008 being exploited?

Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• >= 9.8.0, < 9.9.1
• >= 9.8.0, < 9.9.1-alpha.3

CVSS scores

References (4)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2026-50008
• PATCHgithub.com/parse-community/parse-server
• WEBgithub.com/parse-community/parse-server/pull/10482
• WEBgithub.com/parse-community/parse-server/security/advisories/GHSA-p84r-h6rx-f2xr