MongoDB Sharded Deployment View Privilege Bypass (Auth Flaw)
CVE-2026-120826 Published on November 10, 2026
Improper Authorization in MongoDB Server Sharded View Definition Handling Leads to Cross-Database Unauthorized Access
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.
Vulnerability Analysis
CVE-2026-120826 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is an AuthZ Vulnerability?
The software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
CVE-2026-120826 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2026-120826
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Affected Versions
MongoDB Server:- Version 9.0.0 and below 9.0.7 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.