EUVD-2026-56882
GHSA-vh87-wfq5-jrqm
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/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
Network-reachable with low-privilege auth required; limited confidentiality and conditional integrity impact; no availability effect and no scope change.
Primary rating from Vendor (mongodb).
CVSS VectorVendor: mongodb
Lifecycle Timeline
3DescriptionCVE.org
An issue in MongoDB Server could allow an authenticated user with a limited database-scoped role to perform an action against protected system collections that should require more specific privileges. This could result in exposure of collection metadata and, on certain deployment configurations, unauthorized modification of system collection data.
AnalysisAI
Insufficient privilege enforcement in MongoDB Server allows an authenticated user holding only a limited database-scoped role to operate against protected system collections normally restricted to higher-privilege roles. Affected versions span the 7.0, 8.0, and 8.3 release lines. Depending on deployment configuration, exploitation can expose collection metadata or enable unauthorized modification of system collection data. No public exploit has been identified at time of analysis, and SSVC assessment confirms no observed exploitation.
Technical ContextAI
MongoDB Server implements a role-based access control (RBAC) model where database-scoped roles are intended to constrain user actions to specific databases and collections. CWE-863 (Incorrect Authorization) describes the root cause: the authorization check fails to correctly enforce that operations against system collections require elevated, purpose-specific privileges beyond what a standard database-scoped role provides. The flaw resides in the server-side privilege evaluation logic for system collection access paths. CPE cpe:2.3:a:mongodb:mongodb_server:*:*:*:*:*:*:*:* covers all editions of the server component. The affected version ranges - 7.0 before 7.0.40, 8.0 before 8.0.29, and 8.3.0 before 8.3.8 - span current major release trains, indicating the authorization defect was present across a significant development window.
RemediationAI
The primary remediation is upgrading to the patched releases: MongoDB Server 7.0.40, 8.0.29, or 8.3.8, per vendor-released patch. The MongoDB Jira issue SERVER-130481 (https://jira.mongodb.org/browse/SERVER-130481) is the authoritative upstream reference. As a compensating control where immediate upgrade is not feasible, review and audit all database-scoped role assignments to ensure no user holds broader roles than operationally necessary - tightening role grants reduces the pool of accounts that could trigger this path. Additionally, enabling MongoDB audit logging to monitor access to system collections (system.users, system.roles, etc.) can provide detection coverage while the patch is staged. Note that audit logging introduces I/O overhead and should be capacity-tested before enabling in high-throughput environments.
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Same weakness CWE-863 – Incorrect Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today