Use-after-free in MongoDB Server - CVE-2026-13071
Published: August 18, 2026
Vulnerability identifier: #VU144112
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-13071
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to use-after-free in server-side JavaScript aggregation expressions when processing aggregation expressions that execute server-side JavaScript during document processing. A remote user can send specially crafted aggregation expressions to cause a denial of service.
The issue can terminate the mongod process and requires read access.
Affected software
MongoDB Server
How to mitigate CVE-2026-13071
Install security update from vendor's website.
MongoDB Server - addressed in versions 7.0.39, 8.0.28, 8.2.12, 8.3.7