{"id":"CVE-2026-9750","aliases":["BIT-mongodb-2026-9750"],"url":"https://o3.security/vulnerability/CVE-2026-9750","summary":"Metadata name collision on $-prefixed fields causes post-auth server crash","details":"An authenticated user can cause a MongoDB server to crash or return incorrect results by creating documents that interfere with internal metadata processing during query execution. This stems from insufficient separation between user-controlled document fields and internal metadata in certain execution paths.","published":"2026-06-09T22:17:08.144Z","modified":"2026-08-12T16:09:35.764163Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://jira.mongodb.org/browse/SERVER-123633"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/9xxx/CVE-2026-9750.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-9750"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T16:09:35.764163Z"}}