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HIGH · 7.1

CVE-2026-18688

An issue in MongoDB Server's aggregation framework could allow an authenticated user to trigger an out-of-bounds memory read by providing a specially formed numeric parameter in a certain aggregation ...

Vulnerability Description

An issue in MongoDB Server's aggregation framework could allow an authenticated user to trigger an out-of-bounds memory read by providing a specially formed numeric parameter in a certain aggregation pipeline stage. This could result in a server crash (denial of service) and may potentially expose a limited amount of memory contents.

CVSS Score

7.1

HIGH

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

Affected Products

VendorProductVersions
MongodbMongodb>= 7.0.0, < 7.0.40

Related Weaknesses (CWE)

CWE-125

References

FAQ

What is CVE-2026-18688?

CVE-2026-18688 is a vulnerability with a CVSS score of 7.1 (HIGH). An issue in MongoDB Server's aggregation framework could allow an authenticated user to trigger an out-of-bounds memory read by providing a specially formed numeric parameter in a certain aggregation ...

How severe is CVE-2026-18688?

CVE-2026-18688 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-18688?

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