CVE-2026-114645: A 32-bit integer wraparound in the MongoDB C Driver's Windows-only Kerberos/SSPI authentication code can cause an undersized heap buffer to be allocated when…

PriorityP426medium5.2CVSS 3.1

AVLACHPRHUINSUCLILAH

EPSS

0.17%

5.6th percentile

no history available

A 32-bit integer wraparound in the MongoDB C Driver's Windows-only Kerberos/SSPI authentication code can cause an undersized heap buffer to be allocated when an excessively long credential value is supplied in the client's connection configuration. A party able to control that client-side configuration, in conjunction with the affected authentication mechanism, can cause the driver to write outside the bounds of the allocated buffer. This may result in corruption of client process memory and denial of service of the client application. The issue affects only client builds compiled with the Windows-native authentication backend.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
mongodb	c_driver	>= 1.6.0 < 1.30.14	1.30.14
mongodb	c_driver	>= 2.0.0 < 2.5.7	2.5.7

CVSS provenance

nvdv3.15.2MEDIUMCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:H

nvdv4.05.7MEDIUMCVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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