What is CVE-2026-1849?

CVE-2026-1849 is a medium-severity vulnerability in Mongodb, classified under Uncontrolled Recursion. CVSS score: 6.5/10. Published 2026-02-10.

How severe is CVE-2026-1849?

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

Vulnerability in Mongodb

CVE-2026-1849

MongoDB Server may experience an out-of-memory failure while evaluating expressions that produce deeply nested documents. The issue arises in recursive functions because the server does not periodically check the depth of the expression.

EPSS: 0.003 (18.9th 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 Inc Server — versions 8.0, 7.0, 8.2

Weakness classification (CWE)

CWE-674 — Uncontrolled Recursion

References

cna@mongodb.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-1849?: CVE-2026-1849 is a medium-severity vulnerability in Mongodb, classified under Uncontrolled Recursion. CVSS score: 6.5/10. Published 2026-02-10.
How severe is CVE-2026-1849?: Medium severity. CVSS v3 base score is 6.5 out of 10.