CVE-2026-18706

EUVD-2026-56863
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.6 MEDIUM
NETWORK
HIGH
HIGH
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 37.82%
Affected Products (NVD)
VendorProductVersion
mongodbmongodb
8.3.0 ≤
𝑥
< 8.3.8
mongodbmongodb
9.0.0:alpha0
mongodbmongodb
9.0.0:alpha1
𝑥
= Vulnerable software versions
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
mongodb
bionic
needs-triage
focal
needs-triage
jammy
dne
noble
dne
resolute
dne
trusty
needs-triage
xenial
needs-triage
Common Weakness Enumeration
References
https://jira.mongodb.org/browse/SERVER-128551