NVD security advisory
Security advisory for CVE-2026-120956
CVE-2026-120956
Full advisory details, affected packages, severity context, and original source.
Affected technology
CVE-2026-120956Affected product
Advisory overview
The MongoDB C Driver does not validate the type or format of a namespace field returned by the server in a query response. A MongoDB endpoint that a client application connects to, without needing any credentials, can return a malformed value in that field. This causes the client application process to terminate, and can also cause the driver to read memory outside an allocated buffer and to send a small amount of the application's own uninitialized heap memory back to the endpoint in a follow-up command. The impact is limited to the process that embeds the driver.