GHSA-G4CF-XJ29-WQQR

Vulnerability from github – Published: 2026-03-24 19:11 – Updated: 2026-03-24 19:11
VLAI?
Summary
Parse Server: Denial of Service via unindexed database query for unconfigured auth providers
Details

Impact

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.

Patches

The 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.

Workarounds

There is no known workaround other than upgrading.

Resources

  • GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-g4cf-xj29-wqqr
  • Fix Parse Server 9: https://github.com/parse-community/parse-server/pull/10270
  • Fix Parse Server 8: https://github.com/parse-community/parse-server/pull/10271
Severity ?
8.7 (High)
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
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "parse-server"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "9.0.0"
            },
            {
              "fixed": "9.6.0-alpha.52"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "parse-server"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.6.58"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-33538"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-24T19:11:40Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### 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.\n\n### Resources\n\n- GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-g4cf-xj29-wqqr\n- Fix Parse Server 9: https://github.com/parse-community/parse-server/pull/10270\n- Fix Parse Server 8: https://github.com/parse-community/parse-server/pull/10271",
  "id": "GHSA-g4cf-xj29-wqqr",
  "modified": "2026-03-24T19:11:40Z",
  "published": "2026-03-24T19:11:40Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/security/advisories/GHSA-g4cf-xj29-wqqr"
    },
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/pull/10270"
    },
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/pull/10271"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/parse-community/parse-server"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Parse Server: Denial of Service via unindexed database query for unconfigured auth providers"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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