What is CVE-2026-9746?

CVE-2026-9746 is a medium-severity vulnerability in Mongodb, classified under Reachable Assertion. CVSS score: 6.5/10. Published 2026-06-09.

How severe is CVE-2026-9746?

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

Vulnerability in Mongodb

CVE-2026-9746

When using $changestreams and $_requestReshardingResumeToken with the exchange option the server hits an invariant which causes the server to crash. There are no special privileges needed. The user must be logged in to issue the statement.

EPSS: 0.003 (19.0th 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 8.3.0, 8.2.0, 8.0.0

Weakness classification (CWE)

CWE-617 — Reachable Assertion

References

cna@mongodb.com (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-9746?: CVE-2026-9746 is a medium-severity vulnerability in Mongodb, classified under Reachable Assertion. CVSS score: 6.5/10. Published 2026-06-09.
How severe is CVE-2026-9746?: Medium severity. CVSS v3 base score is 6.5 out of 10.