{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-9748", "assignerOrgId": "a39b4221-9bd0-4244-95fc-f3e2e07f1deb", "state": "PUBLISHED", "assignerShortName": "mongodb", "dateReserved": "2026-05-27T17:47:07.609Z", "datePublished": "2026-06-09T22:08:22.075Z", "dateUpdated": "2026-06-09T22:08:22.075Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "a39b4221-9bd0-4244-95fc-f3e2e07f1deb", "shortName": "mongodb", "dateUpdated": "2026-06-09T22:08:22.075Z"}, "title": "$_internalConvertBucketIndexStats may crash the mongod server when working on no timeseries input", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-617", "description": "CWE-617 Reachable assertion", "type": "CWE"}]}], "affected": [{"vendor": "MongoDB", "product": "MongoDB Server", "versions": [{"status": "affected", "version": "8.3.0", "lessThan": "8.3.3", "versionType": "semver"}, {"status": "affected", "version": "8.2.0", "lessThan": "8.2.10", "versionType": "semver"}, {"status": "affected", "version": "8.0.0", "lessThan": "8.0.10", "versionType": "semver"}, {"status": "affected", "version": "7.0.0", "lessThan": "7.0.35", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "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.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "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."}]}], "references": [{"url": "https://jira.mongodb.org/browse/SERVER-123951"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 7.1, "vectorString": "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"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseSeverity": "MEDIUM", "baseScore": 6.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}}], "source": {"discovery": "INTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.2"}}}}

{}

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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[8.3.0,8.3.3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[8.2.0,8.2.10)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[8.0.0,8.0.10)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[7.0.0,7.0.35)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "MongoDB Server", "source": "cna", "vendor": "MongoDB"}, "product": "mongodb_server", "vendor": "mongodb"}], "created": "2026-06-09T23:45:15.681004+00:00", "updated": "2026-06-10T00:30:16.771821+00:00", "vendors": ["mongodb", "mongodb$PRODUCT$mongodb_server"]}