What is CVE-2026-106428?

CVE-2026-106428 is a low-severity vulnerability in MongoDB C Driver, classified under Out-of-bounds Read. CVSS score: 3.7/10. Published 2026-10-08.

How severe is CVE-2026-106428?

Low severity. CVSS v3 base score is 3.7 out of 10.

Out-of-bounds Read in MongoDB C Driver

CVE-2026-106428

An out-of-bounds read in SCRAM authentication response parsing in the MongoDB C Driver can read one byte beyond a fixed-size buffer when processing a malformed server-final message. A server or network intermediary able to provide this message before server-signature verification can cause the application using the driver to terminate. The extra byte is not returned through the protocol.

Vulnerability class: Buffer Overflow

Published 2026-10-08 · last modified 2026-10-08.

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

MongoDB C Driver

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

jira.mongodb.org/browse/CDRIVER-6370

Frequently asked questions

What is CVE-2026-106428?: CVE-2026-106428 is a low-severity vulnerability in MongoDB C Driver, classified under Out-of-bounds Read. CVSS score: 3.7/10. Published 2026-10-08.
How severe is CVE-2026-106428?: Low severity. CVSS v3 base score is 3.7 out of 10.