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Vulnerability record · CVE-2026-96746 · published 24 September 2026

CVE-2026-96746: Out-of-bounds write vulnerability

An out-of-bounds write in the connection-monitoring logic of the MongoDB C Driver may allow an unauthenticated party who controls name resolution and the responses of the hosts named in a client's connection string to write beyond the end of a heap buffer. This may cause the application using the driver to terminate unexpectedly.

8.3 CVSS 4.0 High EPSS 0.37% · top 72.1% CWE-787 · Out-of-bounds write Awaiting Analysis
8.3CVSS 4.0 base score
0.37%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
24 Sep 2026Last modified by NVD

Description

An out-of-bounds write in the connection-monitoring logic of the MongoDB C Driver may allow an unauthenticated party who controls name resolution and the responses of the hosts named in a client's connection string to write beyond the end of a heap buffer. This may cause the application using the driver to terminate unexpectedly.

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/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:

References

LinkTags
https://github.com/mongodb/mongo-c-driver/releases/tag/1.30.12
https://github.com/mongodb/mongo-c-driver/releases/tag/2.5.5
https://github.com/mongodb/mongo-c-driver/security/advisories/GHSA-frjf-h5jg-4v46

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Source: NIST National Vulnerability Database (record CVE-2026-96746), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.