parse-server: Server option routeAllowList is bypassable through batch sub-requests

### Impact 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. ### Patches `routeAllowList` is now re-enforced for each batch sub-request inside the batch handler before dispatch, mirroring the existing per-sub-request rate-limit enforcement pattern. The path-normalization and regex-match logic was extracted into a shared helper used by both the outer middleware and the batch handler. Master and maintenance keys bypass the per-sub-request check on the same terms as the outer middleware. ### Workarounds Operators who use `routeAllowList` and have allowlisted `batch` can mitigate without upgrading by explicitly including every inner route they intend to allow via batch in the allow-list (for example, `routeAllowList: ['batch', 'classes/Public.*', 'functions/allowedFunction']`). This approach makes those inner routes reachable as direct REST requests as well, so it is broader than the post-patch behavior, but it eliminates the bypass. Operators who do not configure `routeAllowList` are not affected. Parse Server v8 LTS is not affected because `routeAllowList` was introduced in v9.8.0.

Source published

19 Jun 2026 19:34:41 UTC

Source modified

19 Jun 2026 19:56:23 UTC

Observed here

24 Oct 2026 13:17:17 UTC

Source terms

GitHub Advisory Database · CC-BY-4.0

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CVSS_V4 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

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