CVE-2026-50008 Parse Server: Server option routeAllowList is bypassable through batch sub-requests
Attackers can bypass the routeAllowList security feature by sending batch sub-requests, accessing restricted API routes despite authentication controls.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-50008?
CVE-2026-50008 is a medium-severity vulnerability in parse-community parse-server, published on 12 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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-alpha.3, 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-alpha.3.
Weakness: CWE-863
Which versions are affected by CVE-2026-50008?
3 open source packages ship an affected version, including parse-server and parse.
| Package | Affected | Fixed in |
|---|---|---|
parse-server npm | From 9.8.0 | 9.9.1-alpha.3 |
parse-server npm | From 9.8.0 | 9.9.1-alpha.3 |
parse Bitnami | From 9.8.0 | 9.9.1 |
How do I fix CVE-2026-50008?
Upgrade parse-server to 9.9.1-alpha.3 or later.
Is CVE-2026-50008 being exploited?
There is no known exploitation of CVE-2026-50008 in the wild and no public exploit code.
Sources
Also known as BIT-parse-2026-50008, GHSA-p84r-h6rx-f2xr.