{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-82059","assignerOrgId":"a39b4221-9bd0-4244-95fc-f3e2e07f1deb","state":"PUBLISHED","assignerShortName":"mongodb","dateReserved":"2026-08-27T22:51:40.217Z","datePublished":"2026-09-08T16:12:20.797Z","dateUpdated":"2026-09-08T17:59:27.282Z"},"containers":{"cna":{"providerMetadata":{"orgId":"a39b4221-9bd0-4244-95fc-f3e2e07f1deb","shortName":"mongodb","dateUpdated":"2026-09-08T16:12:20.797Z"},"title":"Improper Access Restriction of Internal Aggregation Expression in MongoDB Server Leads to Assertion Failure and Denial of Service","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":"8.3.9","versionType":"semver"},{"status":"affected","version":"8.0.0","lessThan":"8.0.30","versionType":"semver"},{"status":"affected","version":"7.0.0","lessThan":"7.0.41","versionType":"semver"}],"defaultStatus":"unaffected"}],"descriptions":[{"lang":"en","value":"An internal aggregation expression in MongoDB Server was incorrectly registered as accessible to any authenticated user rather than being restricted to internal cluster operations. By crafting a malformed index specification within this expression, an authenticated user with read-only privileges could trigger an assertion failure in the index key generation code path. In certain build configurations, this assertion failure results in termination of the mongod process, causing a denial of service to all connected clients.","supportingMedia":[{"type":"text/html","base64":false,"value":"An internal aggregation expression in MongoDB Server was incorrectly registered as accessible to any authenticated user rather than being restricted to internal cluster operations. By crafting a malformed index specification within this expression, an authenticated user with read-only privileges could trigger an assertion failure in the index key generation code path. In certain build configurations, this assertion failure results in termination of the mongod process, causing a denial of service to all connected clients."}]}],"references":[{"url":"https://jira.mongodb.org/browse/SERVER-130571"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","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":"MEDIUM","baseScore":6,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/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":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseSeverity":"MEDIUM","baseScore":5.3,"vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"}}],"source":{"discovery":"INTERNAL"},"x_generator":{"engine":"cve_record_builder.py"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-08T17:59:17.643641Z","id":"CVE-2026-82059","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-08T17:59:27.282Z"}}]}}