{"id":"CVE-2026-9748","state":"PUBLISHED","title":"$_internalConvertBucketIndexStats may crash the mongod server when working on no timeseries input","description":"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 $facet in a pipeline, TeeBuffer receives the unexpected PauseExecution from upstream and hits a hard invariant assertion, crashing mongod.","publishedAt":"2026-06-09T22:08:22.075Z","updatedAt":"2026-06-10T13:34:29.394Z","severity":{"score":7.1,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","source":"mongodb"},"assigner":"mongodb","products":["MongoDB MongoDB Server"],"affected":[{"vendor":"MongoDB","product":"MongoDB Server","defaultStatus":"unaffected","versions":[{"version":"8.3.0","status":"affected","lessThan":"8.3.3","versionType":"semver"},{"version":"8.2.0","status":"affected","lessThan":"8.2.10","versionType":"semver"},{"version":"8.0.0","status":"affected","lessThan":"8.0.10","versionType":"semver"},{"version":"7.0.0","status":"affected","lessThan":"7.0.35","versionType":"semver"}]}],"references":["https://jira.mongodb.org/browse/SERVER-123951"],"weaknesses":["CWE-617"],"ingestedAt":"2026-10-29T20:13:52.441Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/9xxx/CVE-2026-9748.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-9748","state":"PUBLISHED","datePublished":"2026-06-09T22:08:22.075Z","dateUpdated":"2026-06-10T13:34:29.394Z","assignerShortName":"mongodb","assignerOrgId":"a39b4221-9bd0-4244-95fc-f3e2e07f1deb","dateReserved":"2026-05-27T17:47:07.609Z"},"containers":{"cna":{"title":"$_internalConvertBucketIndexStats may crash the mongod server when working on no timeseries input","descriptions":[{"lang":"en","value":"The $_internalConvertBucketIndexStats stage used PauseExecution as a way to signal \"skip this document\" when an index stats conversion failed. 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