{"id":"CVE-2026-82059","title":"An internal aggregation expression in MongoDB Server was incorrectly registered as accessible to any authenticated user rather than being restricted to internal cluster operations","summary":"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 …","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-617"],"vendor":"mongodb","product":"mongodb","affected":["mongodb >= 7.0.0, < 7.0.41","mongodb >= 8.0.0, < 8.0.30","mongodb >= 8.3.0, < 8.3.9"],"patched":["mongodb 8.3.9"],"published":"2026-09-08","updated":"2026-09-16","sourceUpdated":"2026-09-16T20:36:07.327","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-82059","references":[{"url":"https://jira.mongodb.org/browse/SERVER-130571","label":"cna@mongodb.com"}],"tags":["nvd","cve.org"],"epss":0.00258,"epssPercentile":0.17808,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-08T17:59:17.643641Z"},"ingestedAt":"2026-09-08T16:34:19.257Z","slug":"CVE-2026-82059","body":"## Overview\n\nAn 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.\n\n## Affected\n\n- `mongodb >= 7.0.0, < 7.0.41`\n- `mongodb >= 8.0.0, < 8.0.30`\n- `mongodb >= 8.3.0, < 8.3.9`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `mongodb 8.3.9`","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}