What is CVE-2026-4359?

CVE-2026-4359 is a low-severity vulnerability in MongoDB C Driver, classified under CWE-158. CVSS score: 2.0/10. Published 2026-03-17.

How severe is CVE-2026-4359?

Low severity. CVSS v3 base score is 2.0 out of 10.

Vulnerability in MongoDB C Driver

CVE-2026-4359

A compromised third party cloud server or man-in-the-middle attacker could send a malformed HTTP response and cause a crash in applications using the MongoDB C driver.

Published 2026-03-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 2.0 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.002 (15.0th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 15.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.001

Affected products

MongoDB C Driver
MongoDB Inc C Driver — versions 0

Weakness classification (CWE)

CWE-158

References

jira.mongodb.org/browse/CDRIVER-6251 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-4359?: CVE-2026-4359 is a low-severity vulnerability in MongoDB C Driver, classified under CWE-158. CVSS score: 2.0/10. Published 2026-03-17.
How severe is CVE-2026-4359?: Low severity. CVSS v3 base score is 2.0 out of 10.