VDB
CVE-2026-84963
CVE-2026-84963
PUBLISHED
CVSS 6.3 MEDIUM
Reported by mongodb · Published September 3, 2026
An incorrect numeric conversion in the JSON parsing component of the MongoDB C Driver's BSON library may cause an unusually large text value to be silently shortened, or the corresponding field to be omitted, while the parsing operation still reports success and returns no error. An unauthenticated party who can supply the input processed by an application that uses this component may cause that application to hold data that does not match what was submitted, which may result in unintended alteration of data.
Risk Scores
CVSS 4.0
6.3
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| MongoDB | C Driver | 1.10.0, 2.0.0 |
| MongoDB | C Driver | 1.10.0, 2.0.0 |
Timeline
- Sep 3, 2026 Coalition ESS Score
- Sep 3, 2026 CVE Published
- Sep 3, 2026 CVE Updated
- Sep 4, 2026 EPSS Score
- Sep 12, 2026 EPSS Score
- Sep 17, 2026 EPSS Score