What is CVE-2026-13071?

CVE-2026-13071 is a medium-severity vulnerability in MongoDB, classified under Use After Free. CVSS score: 6.5/10. Published 2026-07-22.

How severe is CVE-2026-13071?

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

Use After Free in MongoDB

CVE-2026-13071

An authenticated user with read access can cause the mongod process to be terminated through certain aggregation expressions that execute server-side JavaScript. The issue involves improper memory handling during document processing.

Vulnerability class: Use-After-Free

EPSS: 0.003 (16.4th 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 7.0, 8.0, 8.2.0

Weakness classification (CWE)

CWE-416 — Use After Free

References

cna@mongodb.com (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-13071?: CVE-2026-13071 is a medium-severity vulnerability in MongoDB, classified under Use After Free. CVSS score: 6.5/10. Published 2026-07-22.
How severe is CVE-2026-13071?: Medium severity. CVSS v3 base score is 6.5 out of 10.