{"id":"CVE-2026-9748","aliases":["BIT-mongodb-2026-9748"],"url":"https://o3.security/vulnerability/CVE-2026-9748","summary":"$_internalConvertBucketIndexStats may crash the mongod server when working on no timeseries input","details":"The $_internalConvertBucketIndexStats stage used PauseExecution as a way to signal \"skip this document\" when an index stats conversion failed. But PauseExecution is not a general purpose skip mechanism, but rather a TeeBuffer-internal signal used solely by $facet to coordinate its sub-pipelines. When this stage is placed before $facet in a pipeline, TeeBuffer receives the unexpected PauseExecution from upstream and hits a hard invariant assertion, crashing mongod.","published":"2026-06-09T22:08:22.075Z","modified":"2026-08-12T16:09:35.029453Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://jira.mongodb.org/browse/SERVER-123951"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/9xxx/CVE-2026-9748.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-9748"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T16:09:35.029453Z"}}