CVE-2026-106438
Published:October 08, 2026
Updated:October 10, 2026
An incorrect calculation in Decimal128 string parsing in the MongoDB C Driver can accept certain over-precision inputs containing leading zeros instead of rejecting them. This produces a value different from the supplied text. An actor who can provide a decimal string to an embedding application, including through Extended JSON parsing, can cause the application to store or use an incorrect numeric value.
Affected Packages
libbson (CONDA):
Affected version(s) >=2.4.0 <2.5.6Fix Suggestion:
Update to version 2.5.6https://github.com/mongodb/mongo-c-driver.git (GITHUB):
Affected version(s) >=1.10.0 <1.30.13Fix Suggestion:
Update to version 1.30.13https://github.com/mongodb/mongo-c-driver.git (GITHUB):
Affected version(s) >=2.0.0 <2.5.6Fix Suggestion:
Update to version 2.5.6Related Resources (1)
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Contact UsCVSS v4
Base Score:
5.1
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Incorrect Calculation
EPSS
Base Score:
0.11