mongo-c-driver: A memory-handling error in the BSON-to-JSON conversion helpers of the MongoDB C Driver can write a small number of by...
CVE-2026-84969 is fixed in mongo-c-driver on 1 platform by DEBIAN-CVE-2026-84969 (version 2.5.2-1), released September 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| mongo-c-driver · Debian 14 | 2.5.2-1 | DEBIAN-CVE-2026-84969 | Sep 10, 2026 |
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