CVE-2026-106430: medium-severity vulnerability in MongoDB C++ Driver
Query and rename target confusion via embedded NUL truncation in MongoDB C++ Driver
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6epss 0.2%
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.
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
Affected products
MongoDB · C++ DriverRelated CVEs — MongoDB C++ Driver
In the same product, most dangerous first.
CVE-2026-81522HIGHCross-tenant database retargeting via dot/NUL injection in namespace strings in the C++ DriverEPSS 0.5%CVE-2026-88034MEDIUMGridFS data disclosure and deletion via query-operator injection in file IDs in the MongoDB C++ DriverEPSS 0.5%CVE-2026-84966MEDIUMBSON element injection via NUL-embedded document keys in builder appendEPSS 0.1%CVE-2026-84970MEDIUMHeap over-read or silent misparse via 32-bit truncation of JSON length in BSON JSON parserEPSS 0.1%