CVE-2026-120956
The MongoDB C Driver does not validate the type or format of a namespace field returned by the…
- Risk score
- 48/100
- CVSS
- 7.1 v3.1
- Published
- 3 Nov 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 …
- Affected
- See advisory
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 7.1 high
- Remotely exploitable without logging in
References
Original description
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.
Last activity 3 Nov 2026. Patch Forecast updates every hour.