CVE-2026-106437
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
47/100
Published: 2026-10-08
Modified: 2026-10-27
First seen: 2026-10-29
Status: active
Attack Surface
Low Complexity
No Auth
No Interaction
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
None
UI:
None
S:
X
AT:
Present
VC:
Low
VI:
Low
VA:
High
Description
The BSON buffer-reservation API in the MongoDB C Driver can record a length smaller than the five-byte BSON minimum. Later append or comparison operations can underflow unsigned length calculations and read or write outside the document buffer. An actor who can influence the length supplied by an embedding application can cause the application to terminate or read or corrupt adjacent process memory. Reaching this issue requires the application to pass an undersized value to bson_reserve_buffer and then perform an affected operation.
Weakness Classification (1)
References & Advisories (1)
Vendor Advisory
Issue Tracking