{"id":"GHSA-827p-g5x5-h86c","summary":"Parse Server LiveQuery subscription with invalid regular expression crashes server","details":"### Impact\n\nA remote attacker can crash the Parse Server by subscribing to a LiveQuery with an invalid regular expression pattern. The server process terminates when the invalid pattern reaches the regex engine during subscription matching, causing denial of service for all connected clients.\n\n### Patches\n\nThe fix validates regular expression patterns at subscription time, rejecting invalid patterns before they are stored. Additionally, a defense-in-depth try-catch prevents any subscription matching error from crashing the server process.\n\n### Workarounds\n\nDisable LiveQuery if it is not needed.","aliases":["BIT-parse-2026-32770","CVE-2026-32770"],"modified":"2026-03-20T12:26:07.201571Z","published":"2026-03-17T18:37:30Z","database_specific":{"cwe_ids":["CWE-248"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-03-17T18:37:30Z","nvd_published_at":"2026-03-18T22:16:25Z"},"references":[{"type":"WEB","url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-827p-g5x5-h86c"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-32770"},{"type":"WEB","url":"https://github.com/parse-community/parse-server/pull/10197"},{"type":"WEB","url":"https://github.com/parse-community/parse-server/pull/10199"},{"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.19"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-827p-g5x5-h86c/GHSA-827p-g5x5-h86c.json"}},{"package":{"name":"parse-server","ecosystem":"npm","purl":"pkg:npm/parse-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"8.6.43"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-827p-g5x5-h86c/GHSA-827p-g5x5-h86c.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}