What is CVE-2026-11933?

CVE-2026-11933 is a high-severity vulnerability in Mongodb, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2026-06-12.

How severe is CVE-2026-11933?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Mongodb

CVE-2026-11933

A use-after-free vulnerability exists in MongoDB Server's server-side JavaScript engine when converting BSON documents to JavaScript arrays. An authenticated user with read privileges who is able to run server-side JavaScript (for example…

Vulnerability class: Buffer Overflow

EPSS: 0.004 (31.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Mongodb — versions 8.3.0, 8.2.0, 8.0.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write
CWE-416 — Use After Free

References

cna@mongodb.com (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-11933?: CVE-2026-11933 is a high-severity vulnerability in Mongodb, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2026-06-12.
How severe is CVE-2026-11933?: High severity. CVSS v3 base score is 8.8 out of 10.