CVE-2026-81524 MEDIUM

CVE-2026-81524: Cross-tenant database retargeting via dot/NUL injection in namespace strings in the C Driver

Vendor Mongodb
Product C Driver
Weakness CWE-99
Published August 27, 2026
Last update August 28, 2026

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

August 27, 2026 CVE published
August 28, 2026 Record updated