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CVE PROGRAM SOURCE RECORD6.3 Medium

CVE-2026-84969

Heap overflow via truncated base64 encoding of binary fields in length-limited JSON output

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Status
Published
Published
Updated
Assigning organization
mongodb

Description

A memory-handling error in the BSON-to-JSON conversion helpers of the MongoDB C Driver can write a small number of bytes past the end of a heap buffer when a binary field is encoded and the output is cut short at a caller-configured length limit. A party who supplies the document content, with no privileges on the application that links the driver, may cause a small amount of data outside the intended buffer to be altered.

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

  • 1.30.0 to < 1.30.9affected
  • 2.0.0 to < 2.5.2affected

References