{"id":"CVE-2026-50008","aliases":["BIT-parse-2026-50008","GHSA-p84r-h6rx-f2xr"],"url":"https://o3.security/vulnerability/CVE-2026-50008","summary":"Parse Server: Server option routeAllowList is bypassable through batch sub-requests","details":"### 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.","published":"2026-06-12T18:22:44.188Z","modified":"2026-10-21T02:58:24.227633388Z","cvss":null,"epss":{"score":0.00343,"percentile":0.27726,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"parse-server","fixedVersion":"9.9.1-alpha.3"}],"fix":{"url":"https://github.com/parse-community/parse-server/pull/10482","label":"parse-community/parse-server#10482"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50008.json"},{"type":"ADVISORY","url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-p84r-h6rx-f2xr"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50008"},{"type":"FIX","url":"https://github.com/parse-community/parse-server/pull/10482"},{"type":"PACKAGE","url":"https://github.com/parse-community/parse-server"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-21T02:58:24.227633388Z"}}