What is CVE-2026-9753?

CVE-2026-9753 is a high-severity vulnerability in Mongodb, classified under CWE-1287. CVSS score: 8.1/10. Published 2026-06-09.

How severe is CVE-2026-9753?

High severity. CVSS v3 base score is 8.1 out of 10.

Buffer overflow in Mongodb

CVE-2026-9753

The $_internalApplyOplogUpdate aggregation pipeline stage can be used to execute a document diff containing a malformed binary diff to return memory out-of-bounds or crash the server. $_internalApplyOplogUpdate can be executed by any authe…

EPSS: 0.003 (22.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.

Affected products

Mongodb
Mongodb Server — versions 8.3.0, 8.2.0, 8.0.0

Weakness classification (CWE)

CWE-1287
CWE-787 — Out-of-bounds Write

References

cna@mongodb.com (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-9753?: CVE-2026-9753 is a high-severity vulnerability in Mongodb, classified under CWE-1287. CVSS score: 8.1/10. Published 2026-06-09.
How severe is CVE-2026-9753?: High severity. CVSS v3 base score is 8.1 out of 10.