{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "fixed": "8.6.56"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "a59a60794ef645f15969a43340c5fb3110b09e7f"
            }
          ],
          "repo": "https://github.com/parse-community/parse-server",
          "type": "GIT"
        },
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "9.0.0"
              },
              {
                "fixed": "9.6.0-alpha.45"
              }
            ]
          },
          "events": [
            {
              "introduced": "532a461d30a6ed4457839f2caf5f30d5abf51a55"
            },
            {
              "fixed": "12fdbd617fd2bd936c6be4ad7c429deb77c0cf16"
            }
          ],
          "repo": "https://github.com/parse-community/parse-server",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-6qh5-m6g3-xhq6"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-674"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33508.json"
  },
  "details": "Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.56 and 9.6.0-alpha.45, Parse Server's LiveQuery component does not enforce the requestComplexity.queryDepth configuration setting when processing WebSocket subscription requests. An attacker can send a subscription with deeply nested logical operators, causing excessive recursion and CPU consumption that degrades or disrupts service availability. This issue has been patched in versions 8.6.56 and 9.6.0-alpha.45.",
  "id": "CVE-2026-33508",
  "modified": "2026-04-01T23:09:25.954996066Z",
  "published": "2026-03-24T18:21:08.477Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33508.json"
    },
    {
      "type": "FIX",
      "url": "https://github.com/parse-community/parse-server/commit/060d27053fb0fadf613c25aabab7fe0c82b7a899"
    },
    {
      "type": "FIX",
      "url": "https://github.com/parse-community/parse-server/commit/2126fe4e12f9b399dc6b4b6a3fa70cb1825f159b"
    },
    {
      "type": "FIX",
      "url": "https://github.com/parse-community/parse-server/pull/10259"
    },
    {
      "type": "FIX",
      "url": "https://github.com/parse-community/parse-server/pull/10260"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/parse-community/parse-server/security/advisories/GHSA-6qh5-m6g3-xhq6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33508"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Parse Server: LiveQuery subscription query depth bypass"
}