What is CVE-2026-8336?

CVE-2026-8336 is a high-severity vulnerability in Mongodb, classified under Use After Free. CVSS score: 7.5/10. Published 2026-05-13.

How severe is CVE-2026-8336?

High severity. CVSS v3 base score is 7.5 out of 10.

Use After Free in Mongodb

CVE-2026-8336

After invoking $_internalJsEmit, which is not intended to be directly accessible, or mapreduce command’s map function in a certain way, an authenticated user can subsequently crash mongod when the server-side JavaScript engine (through $wh…

Vulnerability class: Use-After-Free

EPSS: 0.001 (20.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Mongodb
Mongodb, Inc. Mongodb Server — versions 7.0, 8.0, 8.2

Weakness classification (CWE)

CWE-416 — Use After Free

References

cna@mongodb.com (issue-tracking, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2026-8336?: CVE-2026-8336 is a high-severity vulnerability in Mongodb, classified under Use After Free. CVSS score: 7.5/10. Published 2026-05-13.
How severe is CVE-2026-8336?: High severity. CVSS v3 base score is 7.5 out of 10.