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HIGH · 7.5

CVE-2026-18697

An issue in MongoDB Server's aggregation framework could allow an unauthenticated party to cause a mongos (router) process to terminate unexpectedly by submitting a specially formed aggregation comman...

Vulnerability Description

An issue in MongoDB Server's aggregation framework could allow an unauthenticated party to cause a mongos (router) process to terminate unexpectedly by submitting a specially formed aggregation command. This could result in a denial of service, disrupting client connections routed through the affected mongos instance.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
MongodbMongodb>= 7.0.0, < 7.0.40

Related Weaknesses (CWE)

CWE-617

References

FAQ

What is CVE-2026-18697?

CVE-2026-18697 is a vulnerability with a CVSS score of 7.5 (HIGH). An issue in MongoDB Server's aggregation framework could allow an unauthenticated party to cause a mongos (router) process to terminate unexpectedly by submitting a specially formed aggregation comman...

How severe is CVE-2026-18697?

CVE-2026-18697 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-18697?

Check the references section above for vendor advisories and patch information. Affected products include: Mongodb Mongodb.