CVE-2026-18706

MEDIUMCVSS 6.6/10EPSS 0.34%

Last modified

CVE-2026-18706 is a medium-severity vulnerability rated 6.6/10 on the CVSS scale. An issue in MongoDB Server's $graphLookup aggregation stage could allow an authenticated user able to issue aggregation and memory-management commands to cause an internal reference to be used after the underlying memory has been freed. This could result in a server crash or, potentially, execution of unintended code.. EPSS estimates a 0.34% chance of exploitation in the next 30 days.

Description

An issue in MongoDB Server's $graphLookup aggregation stage could allow an authenticated user able to issue aggregation and memory-management commands to cause an internal reference to be used after the underlying memory has been freed. This could result in a server crash or, potentially, execution of unintended code.

Metrics

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
MongodbMongodb>= 8.3.0, < 8.3.8—
MongodbMongodb9.0.0Alpha0

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2026-18706?
An issue in MongoDB Server's $graphLookup aggregation stage could allow an authenticated user able to issue aggregation and memory-management commands to cause an internal reference to be used after the underlying memory has been freed. This could result in a server crash or, potentially, execution of unintended code.
How severe is CVE-2026-18706?
CVE-2026-18706 has a CVSS score of 6.6/10 (MEDIUM severity). The EPSS model estimates a 0.34% probability of exploitation in the next 30 days.
How do I fix CVE-2026-18706?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST