What is CVE-2026-8843?

CVE-2026-8843 is a medium-severity vulnerability in Mongodb, Inc. Mongodb Server, classified under Reachable Assertion. CVSS score: 6.5/10. Published 2026-05-18.

How severe is CVE-2026-8843?

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

Vulnerability in Mongodb, Inc. Mongodb Server

CVE-2026-8843

Creating a "2dsphere_bucket" index on a non-timeseries bucket collection will succeed, but any subsequent attempt to insert a document which triggers updating that index will crash the server. A similar issue occurs when creating "queryabl…

EPSS: 0.000 (13.9th 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, Inc. Mongodb Server — versions 7.0, 8.0, 8.2

Weakness classification (CWE)

CWE-617 — Reachable Assertion

References

cna@mongodb.com (issue-tracking)

Frequently asked questions

What is CVE-2026-8843?: CVE-2026-8843 is a medium-severity vulnerability in Mongodb, Inc. Mongodb Server, classified under Reachable Assertion. CVSS score: 6.5/10. Published 2026-05-18.
How severe is CVE-2026-8843?: Medium severity. CVSS v3 base score is 6.5 out of 10.