CVE-2026-106431 — One-byte heap buffer overflow in BSON bulk document writer in MongoDB C Driver
An off-by-one error in the BSON bulk document writer in the MongoDB C Driver can write one zero byte immediately past a heap allocation when a document ends at a specific buffer…
Published: 2026-10-08 · CVSS: 5.9 · CVSS 4.0
An off-by-one error in the BSON bulk document writer in the MongoDB C Driver can write one zero byte immediately past a heap allocation when a document ends at a specific buffer boundary. An actor who can influence the size of documents serialized by an embedding application can corrupt adjacent process memory or terminate the process. Reaching this issue requires the application to use the BSON bulk-writer API and produce a precise cumulative document size.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7