Medium 6.5Published Jul 22, 2026

CVE-2026-13055Server crash via aggregation pipeline expression with compound wildcard index specification

Updated under an hour ago (Oct 27, 2026, 4:00 AM ET)

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It affects MongoDB Server and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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 aborts the server process. The user must be able to run an aggregation pipeline.

CVSS: 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-617
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: mongodb
NVD analysis: Analyzed
Record last updated: Jul 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

MongoDB MongoDB Server mongodb:server (from the name)	from 7.0 before 7.0.39; from 8.0 before 8.0.28; from 8.2.0 before 8.2.12; from 8.3.0 before 8.3.7	CNA record
mongodb mongodb mongodb:mongodb	from 7.0.0 before 7.0.39; from 8.0.0 before 8.0.28; from 8.2.0 before 8.2.12; from 8.3.0 before 8.3.7	NVD

References

References

https://jira.mongodb.org/browse/SERVER-123081	vendor-advisory, issue-tracking

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.