EUVD-2026-26263Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/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
Network-reachable by any authenticated low-privilege user (PR:L); limited confidentiality, integrity, and availability impact on targeted account's auth data only, no scope change.
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
6DescriptionCVE.org
An authorization flaw in the user management command could allow an authenticated user to make limited changes to authentication-related data associated with another user account. This could affect how authentication is performed for the impacted account.
AnalysisAI
MongoDB Server's user management command contains an authorization flaw allowing authenticated low-privilege users to make limited modifications to authentication-related data belonging to other user accounts. Affected across three active release branches (7.0.x, 8.0.x, 8.2.x), this could allow one MongoDB user to interfere with how authentication is processed for another account - a form of limited horizontal privilege escalation. No public exploit exists and SSVC confirms no observed exploitation, but the network-accessible attack vector and low authentication requirement warrant timely patching in multi-tenant or shared MongoDB environments.
Technical ContextAI
MongoDB Server (CPE: cpe:2.3:a:mongodb:mongodb_server) implements user management via administrative commands that control account creation, modification, and authentication configuration. The root cause is classified as CWE-1284 (Improper Validation of Specified Quantity in Input), suggesting the user management command fails to properly scope or bound the set of authentication-related fields an authenticated caller is permitted to modify, allowing operations to reach data associated with accounts other than the caller's own. The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L) confirms the flaw is reachable over the network by any authenticated user with low privileges, without requiring specific attack conditions (AT:N). The 'Information Disclosure' and 'Red Hat' tags indicate partial read access to authentication data may also be possible, and that Red Hat platform distributions of MongoDB are likely in scope.
RemediationAI
Upgrade to MongoDB Server 8.0.21, 7.0.32, or 8.2.7 as appropriate for your release branch - these are the vendor-confirmed fixed versions per EUVD-2026-26263. The upstream fix is tracked at the MongoDB Jira ticket https://jira.mongodb.org/browse/SERVER-119679. If an immediate upgrade is not feasible, restrict access to the user management command by enforcing least-privilege role assignments: ensure application service accounts do not hold roles that grant access to user management operations (e.g., userAdmin or userAdminAnyDatabase) unless strictly required. Network-level controls such as restricting MongoDB port access (default 27017) to trusted application tiers provide an additional layer but do not address the underlying authorization flaw for users who already have authenticated access.
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Same technique Information Disclosure
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