{"affected":[{"defaultStatus":"unaffected","product":"MongoDB Server","source":"CNA: mongodb","vendor":"MongoDB","versions":[{"lessThan":"9.0.7","status":"affected","version":"9.0.0","versionType":"semver"}]}],"cveId":"CVE-2026-120826","cwes":["CWE-863"],"description":"An authorization flaw in the aggregation and view-definition handling of sharded deployments may allow a user holding only basic read-write privileges on a single database to define a view whose underlying processing is not fully subjected to privilege checking. Reading that view may result in unintended access to data belonging to other databases held on the same shard.","epss":{"date":"2026-11-13","percentile":0.29648,"score":0.00355},"exploits":[],"kev":null,"metrics":[{"score":7.1,"severity":"high","source":"CNA: mongodb","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"},{"score":6.5,"severity":"medium","source":"CNA: mongodb","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},{"score":7.1,"severity":"high","source":"NVD: cna@mongodb.com","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/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","version":"4.0"},{"score":6.5,"severity":"medium","source":"NVD: cna@mongodb.com","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}],"modifiedAt":1794602029621,"publishedAt":1794342124078,"references":[{"source":"CNA: mongodb","tags":[],"url":"https://jira.mongodb.org/browse/SERVER-137361"},{"source":"cna@mongodb.com","tags":[],"url":"https://jira.mongodb.org/browse/SERVER-137361"}],"remediation":[],"revision":"b637e5435da41f9b8bf989b8df9dcd9da280bdd63ba6af0d413beaa8a83f86a2","sources":[{"modifiedAt":1794602029621,"name":"CNA: mongodb","retrievedAt":1794604142845,"url":"https://www.cve.org/CVERecord?id=CVE-2026-120826"},{"modifiedAt":1794348539707,"name":"NVD","retrievedAt":1794357161710,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-120826"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794604159615,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-120826"}],"ssvc":{"assessedAt":1794602019830,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Improper Authorization in MongoDB Server Sharded View Definition Handling Leads to Cross-Database Unauthorized Access","updatedAt":1794604159615}