CVE-2026-84963 — Silent field truncation via unchecked int cast of huge JSON string values in JSON-to-BSON parser
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 cor…
Published: 2026-09-03 · CVSS: 6.3 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7