CVE-2026-106430 Query and rename target confusion via embedded NUL truncation in MongoDB C++ Driver
An authenticated attacker can manipulate field or collection names to cause the application to read or modify unintended data due to NUL byte truncation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-106430?
CVE-2026-106430 is a medium-severity vulnerability in MongoDB C++ Driver, published on 8 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The MongoDB C++ Driver discards content after an embedded NUL byte in certain field and collection names accepted by the collection API. This can cause the driver and the calling application to interpret the same name differently. An authenticated actor who can influence a name passed by an affected application can cause the application to read distinct values from an unintended field or rename an unintended collection. These operations use the application's existing database credentials.
Weakness: CWE-436
Which versions are affected by CVE-2026-106430?
How do I fix CVE-2026-106430?
Apply the vendor's patch.
Is CVE-2026-106430 being exploited?
There is no known exploitation of CVE-2026-106430 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-106430, UBUNTU-CVE-2026-106430.