MongoDB C Driver Namespace Sanitization Flaw Enables Arbitrary Targeting
CVE-2026-81524 Published on August 27, 2026
Cross-tenant database retargeting via dot/NUL injection in namespace strings in the C Driver
A weakness in the MongoDB C Driver allows special elements in caller-supplied database and collection name components to pass without sanitization when the driver composes the target namespace for an operation. An application that incorporates untrusted input into these name components can have operations directed at a resource other than the one intended.
Vulnerability Analysis
CVE-2026-81524 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 Insecure Direct Object Reference Vulnerability?
The software receives input from an upstream component, but it does not restrict or incorrectly restricts the input before it is used as an identifier for a resource that may be outside the intended sphere of control.
CVE-2026-81524 has been classified to as an Insecure Direct Object Reference vulnerability or weakness.
Products Associated with CVE-2026-81524
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Affected Versions
MongoDB C Driver:- Version 1.0.0 and below 2.5.1 is affected.