Skip to content
CVE PROGRAM SOURCE RECORD6.3 Medium

CVE-2026-84963

Silent field truncation via unchecked int cast of huge JSON string values in JSON-to-BSON parser

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

MongoDB C Driver

Default version status: unaffected

  • 1.10.0 to < 1.30.9affected
  • 2.0.0 to < 2.5.2affected

References