What is CVE-2026-13056?

CVE-2026-13056 is a medium-severity vulnerability in MongoDB, classified under CWE-1325. CVSS score: 6.5/10. Published 2026-07-22.

How severe is CVE-2026-13056?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in MongoDB

CVE-2026-13056

Using expressions that generate large arrays it is possible to craft a query that creates very large intermediate objects in memory, causing the server to crash with OOM error.

EPSS: 0.004 (33.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Mongodb
Mongodb Server — versions 8.0, 8.3.0

Weakness classification (CWE)

CWE-1325

References

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

Frequently asked questions

What is CVE-2026-13056?: CVE-2026-13056 is a medium-severity vulnerability in MongoDB, classified under CWE-1325. CVSS score: 6.5/10. Published 2026-07-22.
How severe is CVE-2026-13056?: Medium severity. CVSS v3 base score is 6.5 out of 10.