Vulnerability Details CVE-2026-18704
An issue in MongoDB Server's aggregation framework could allow an authenticated user with only read privileges to perform write operations against collections they should not be able to modify. This is due to an internal-use aggregation stage being reachable by external clients without an appropriate authorization check on its embedded operations.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 11.7%
CVSS Severity
CVSS v3 Score 6.5
Products affected by CVE-2026-18704
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cpe:2.3:a:mongodb:mongodb:8.3.0
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cpe:2.3:a:mongodb:mongodb:8.3.1
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cpe:2.3:a:mongodb:mongodb:8.3.2
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cpe:2.3:a:mongodb:mongodb:8.3.3
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cpe:2.3:a:mongodb:mongodb:8.3.4
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cpe:2.3:a:mongodb:mongodb:8.3.7