CVE-2026-106431

EUVD-2026-95152
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
mongodbCNA
5.7 MEDIUM
LOCAL
HIGH
NONE
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
mongodbc_driver
0.5.0 ≤
𝑥
< 1.30.13
CNA
mongodbc_driver
2.0.0 ≤
𝑥
< 2.5.6
CNA
Common Weakness Enumeration
References
https://jira.mongodb.org/browse/CDRIVER-6418