{"id":"CVE-2026-9747","aliases":["BIT-mongodb-2026-9747"],"url":"https://o3.security/vulnerability/CVE-2026-9747","summary":"Crafted cross-shard merge aggregation crashes MongoDB Server","details":"Adding fromRouter:true and runtimeConstants.userRoles could cause aggregations to crash mongodb server.","published":"2026-06-09T22:05:24.209Z","modified":"2026-08-12T16:09:34.521445Z","cvss":null,"epss":{"score":0.0027,"percentile":0.18607,"asOf":"2026-08-24"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://jira.mongodb.org/browse/SERVER-123918"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/9xxx/CVE-2026-9747.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-9747"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T16:09:34.521445Z"}}