What is CVE-2026-13055?

CVE-2026-13055 is a medium-severity vulnerability in Mongodb Server, classified under Reachable Assertion. CVSS score: 6.5/10. Published 2026-07-22.

How severe is CVE-2026-13055?

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

Vulnerability in Mongodb Server

CVE-2026-13055

The `$_internalIndexKey` aggregation expression can be used by any authenticated user to crash a MongoDB server (mongod). The expression fails to handle compound wildcard index specifications, triggering an internal consistency check that…

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 Server — versions 7.0, 8.0, 8.2.0

Weakness classification (CWE)

CWE-617 — Reachable Assertion

References

cna@mongodb.com

Frequently asked questions

What is CVE-2026-13055?: CVE-2026-13055 is a medium-severity vulnerability in Mongodb Server, classified under Reachable Assertion. CVSS score: 6.5/10. Published 2026-07-22.
How severe is CVE-2026-13055?: Medium severity. CVSS v3 base score is 6.5 out of 10.