{"id":"CVE-2026-50008","title":"parse-server: Server option routeAllowList is bypassable through batch sub-requests","summary":"parse-server: Server option routeAllowList is bypassable through batch sub-requests","severity":"medium","cwe":["CWE-863"],"vendor":"parse-server","product":"parse-server","affected":["parse-server >= 9.8.0, < 9.9.1-alpha.3"],"patched":["parse-server 9.9.1-alpha.3"],"published":"2026-06-19","updated":"2026-06-19","source":"GHSA","sourceUrl":"https://github.com/advisories/GHSA-p84r-h6rx-f2xr","references":[{"url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-p84r-h6rx-f2xr"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50008"},{"url":"https://github.com/parse-community/parse-server/pull/10482"},{"url":"https://github.com/advisories/GHSA-p84r-h6rx-f2xr"}],"tags":["ghsa","npm"],"epss":0.00343,"epssPercentile":0.27808,"ingestedAt":"2026-06-22T15:52:21.068Z","ecosystem":"npm","slug":"CVE-2026-50008","body":"## Overview\n\n### Impact\n\nThe `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.\n\nAuthentication, ACL, CLP, and other inner-route authorization controls still apply — only the operator-configured route firewall is bypassed.\n\n### Patches\n\n`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.\n\n### Workarounds\n\nOperators 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.\n\nOperators who do not configure `routeAllowList` are not affected. Parse Server v8 LTS is not affected because `routeAllowList` was introduced in v9.8.0.\n\n## Affected packages\n\n- `parse-server >= 9.8.0, < 9.9.1-alpha.3`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `parse-server 9.9.1-alpha.3`","depth":"sunlit","depthScore":28,"depthScoreParts":{"impact":27.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}