{"id":"BIT-mongodb-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.","aliases":["CVE-2026-9748"],"modified":"2026-09-08T08:45:15.080461157Z","published":"2026-06-16T11:48:13.844Z","database_specific":{"cpes":["cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*"],"severity":"High"},"references":[{"type":"ADVISORY","url":"https://jira.mongodb.org/browse/SERVER-123951"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-9748"}],"affected":[{"package":{"name":"mongodb","ecosystem":"Bitnami","purl":"pkg:bitnami/mongodb"},"ranges":[{"type":"SEMVER","events":[{"introduced":"7.0.0"},{"fixed":"7.0.35"},{"introduced":"8.0.0"},{"fixed":"8.0.10"},{"introduced":"8.2.0"},{"fixed":"8.2.10"},{"introduced":"8.3.0"},{"fixed":"8.3.3"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/mongodb/BIT-mongodb-2026-9748.json"},"severity":[{"type":"CVSS_V4","score":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}],"schema_version":"1.9.0"}