{"id":"CVE-2026-33538","aliases":["BIT-parse-2026-33538","EUVD-2026-14975","GHSA-g4cf-xj29-wqqr"],"status":"published","title":"Parse Server: Denial of service via unindexed database query for unconfigured auth providers","description":"Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.58 and 9.6.0-alpha.52, an unauthenticated attacker can cause denial of service by sending authentication requests with arbitrary, unconfigured provider names. The server executes a database query for each unconfigured provider before rejecting the request, and since no database index exists for unconfigured providers, each request triggers a full collection scan on the user database. This can be parallelized to saturate database resources. This issue has been patched in versions 8.6.58 and 9.6.0-alpha.52.","severity":{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00431,"percentile":0.37804,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-400"],"published":"2026-03-24T18:24:51Z","modified":"2026-10-28T02:31:14Z","fixes":[{"ecosystem":"npm","package":"parse-server","fixed_in":["9.6.0-alpha.52","8.6.58"],"sources":["ghsa","osv"]},{"ecosystem":"Bitnami","package":"parse","fixed_in":["8.6.58","9.6.0"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"parse-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"9.0.0"},{"fixed":"9.6.0-alpha.52"}]}]},{"source":"ghsa","ecosystem":"npm","package":"parse-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.6.58"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"parse","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"8.6.58"},{"introduced":"9.0.0"},{"fixed":"9.6.0"}]}]},{"source":"osv","ecosystem":"npm","package":"parse-server","ranges":[{"type":"SEMVER","events":[{"introduced":"9.0.0"},{"fixed":"9.6.0-alpha.52"}]}]},{"source":"osv","ecosystem":"npm","package":"parse-server","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"8.6.58"}]}]}],"products":[{"vendor":"parse-community","product":"parse-server"},{"vendor":"parseplatform","product":"parse-server"}],"references":[{"url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-g4cf-xj29-wqqr","tags":["x_refsource_CONFIRM","Vendor Advisory","advisory","web"]},{"url":"https://github.com/parse-community/parse-server/pull/10270","tags":["x_refsource_MISC","Issue Tracking","report","fix","web"]},{"url":"https://github.com/parse-community/parse-server/pull/10271","tags":["x_refsource_MISC","Issue Tracking","report","fix","web"]},{"url":"https://github.com/parse-community/parse-server/commit/40eb442e02672986730007d0a1edb22c1c4bd357","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://github.com/parse-community/parse-server/commit/fbac847499e57f243315c5fc7135be1d58bb8e54","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33538","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-g4cf-xj29-wqqr"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33538.json","tags":["advisory"]},{"url":"https://github.com/parse-community/parse-server","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-33538","title":"Parse Server: Denial of service via unindexed database query for unconfigured auth providers","description":"Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.58 and 9.6.0-alpha.52, an unauthenticated attacker can cause denial of service by sending authentication requests with arbitrary, unconfigured provider names. The server executes a database query for each unconfigured provider before rejecting the request, and since no database index exists for unconfigured providers, each request triggers a full collection scan on the user database. This can be parallelized to saturate database resources. This issue has been patched in versions 8.6.58 and 9.6.0-alpha.52.","status":"published","published":"2026-03-24T18:24:51.595Z","modified":"2026-03-24T18:37:24.02Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:20:08.009733Z"}],"euvd":[{"id":"EUVD-2026-14975","description":"Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.58 and 9.6.0-alpha.52, an unauthenticated attacker can cause denial of service by sending authentication requests with arbitrary, unconfigured provider names. The server executes a database query for each unconfigured provider before rejecting the request, and since no database index exists for unconfigured providers, each request triggers a full collection scan on the user database. This can be parallelized to saturate database resources. This issue has been patched in versions 8.6.58 and 9.6.0-alpha.52.","status":"published","published":"2026-03-24T18:24:51Z","modified":"2026-03-24T18:37:24Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T19:25:29.933437Z"}],"ghsa":[{"id":"GHSA-g4cf-xj29-wqqr","title":"Parse Server: Denial of Service via unindexed database query for unconfigured auth providers","description":"### Impact\n\nAn unauthenticated attacker can cause Denial of Service by sending authentication requests with arbitrary, unconfigured provider names. The server executes a database query for each unconfigured provider before rejecting the request, and since no database index exists for unconfigured providers, each request triggers a full collection scan on the user database. This can be parallelized to saturate database resources.\n\n### Patches\n\nThe fix validates that an authentication provider is configured before executing any database query. Requests with unconfigured providers are now rejected immediately without querying the database.\n\n### Workarounds\n\nThere is no known workaround other than upgrading.","status":"published","published":"2026-03-24T19:11:40Z","modified":"2026-03-27T21:53:47Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:39:44.97342Z"}],"nvd":[{"id":"CVE-2026-33538","description":"Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.58 and 9.6.0-alpha.52, an unauthenticated attacker can cause denial of service by sending authentication requests with arbitrary, unconfigured provider names. The server executes a database query for each unconfigured provider before rejecting the request, and since no database index exists for unconfigured providers, each request triggers a full collection scan on the user database. This can be parallelized to saturate database resources. This issue has been patched in versions 8.6.58 and 9.6.0-alpha.52.","status":"published","published":"2026-03-24T19:16:54.673Z","modified":"2026-06-17T10:37:40.533Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:12:10.568062Z"}],"osv":[{"id":"CVE-2026-33538","title":"Parse Server: Denial of service via unindexed database query for unconfigured auth providers","description":"Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.58 and 9.6.0-alpha.52, an unauthenticated attacker can cause denial of service by sending authentication requests with arbitrary, unconfigured provider names. The server executes a database query for each unconfigured provider before rejecting the request, and since no database index exists for unconfigured providers, each request triggers a full collection scan on the user database. This can be parallelized to saturate database resources. This issue has been patched in versions 8.6.58 and 9.6.0-alpha.52.","status":"published","published":"2026-03-24T18:24:51.595Z","modified":"2026-10-28T02:31:14.660795281Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T15:45:01.896044Z"},{"id":"GHSA-g4cf-xj29-wqqr","title":"Parse Server: Denial of Service via unindexed database query for unconfigured auth providers","description":"### Impact\n\nAn unauthenticated attacker can cause Denial of Service by sending authentication requests with arbitrary, unconfigured provider names. The server executes a database query for each unconfigured provider before rejecting the request, and since no database index exists for unconfigured providers, each request triggers a full collection scan on the user database. This can be parallelized to saturate database resources.\n\n### Patches\n\nThe fix validates that an authentication provider is configured before executing any database query. Requests with unconfigured providers are now rejected immediately without querying the database.\n\n### Workarounds\n\nThere is no known workaround other than upgrading.","status":"published","published":"2026-03-24T19:11:40Z","modified":"2026-03-27T22:03:47.941344Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T15:46:47.119724Z"},{"id":"BIT-parse-2026-33538","title":"Parse Server: Denial of service via unindexed database query for unconfigured auth providers","description":"Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.58 and 9.6.0, an unauthenticated attacker can cause denial of service by sending authentication requests with arbitrary, unconfigured provider names. The server executes a database query for each unconfigured provider before rejecting the request, and since no database index exists for unconfigured providers, each request triggers a full collection scan on the user database. This can be parallelized to saturate database resources. This issue has been patched in versions 8.6.58 and 9.6.0","status":"published","published":"2026-03-27T07:14:39.195Z","modified":"2026-09-08T08:48:17.717801828Z","updated_at":"2026-11-02T15:28:34.343258Z"}]}}