{"id":"GHSA-6qh5-m6g3-xhq6","summary":"Parse Server LiveQuery subscription query depth bypass","details":"### Impact\n\nParse 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.\n\nDeployments are affected when the LiveQuery WebSocket endpoint is reachable by untrusted clients.\n\n### Patches\n\nThe fix adds query condition depth validation to the LiveQuery subscription handler, enforcing the same `requestComplexity.queryDepth` limit that already protects REST API queries.\n\n### Workarounds\n\nThere is no known workaround other than upgrading.","aliases":["BIT-parse-2026-33508","CVE-2026-33508"],"modified":"2026-03-30T14:05:50.544408Z","published":"2026-03-20T21:48:17Z","database_specific":{"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2026-03-20T21:48:17Z","nvd_published_at":"2026-03-24T19:16:54Z","cwe_ids":["CWE-674"]},"references":[{"type":"WEB","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"},{"type":"WEB","url":"https://github.com/parse-community/parse-server/pull/10259"},{"type":"WEB","url":"https://github.com/parse-community/parse-server/pull/10260"},{"type":"WEB","url":"https://github.com/parse-community/parse-server/commit/060d27053fb0fadf613c25aabab7fe0c82b7a899"},{"type":"WEB","url":"https://github.com/parse-community/parse-server/commit/2126fe4e12f9b399dc6b4b6a3fa70cb1825f159b"},{"type":"PACKAGE","url":"https://github.com/parse-community/parse-server"}],"affected":[{"package":{"name":"parse-server","ecosystem":"npm","purl":"pkg:npm/parse-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"9.0.0"},{"fixed":"9.6.0-alpha.45"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-6qh5-m6g3-xhq6/GHSA-6qh5-m6g3-xhq6.json"}},{"package":{"name":"parse-server","ecosystem":"npm","purl":"pkg:npm/parse-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"8.6.56"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-6qh5-m6g3-xhq6/GHSA-6qh5-m6g3-xhq6.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V4","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"}]}