CVE-2026-84969
Low · 3.7CVSS
3.7
EPSS
0.3%
Published
Sep 3, 2026
CISA due date
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The record
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 packages
| Ecosystem | Package | Introduced | Fixed |
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