Type Confusion in MongoDB Server - CVE-2026-13066
Published: August 18, 2026
Vulnerability identifier: #VU144117
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-13066
CWE-ID: CWE-843
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to type confusion in DBPointer BSON serialization in MongoDB's server-side JavaScript engine when processing DBPointer objects during BSON serialization. A remote user can trigger serialization of crafted DBPointer objects to disclose sensitive information.
Only deployments that use server-side JavaScript are affected.
Affected software
MongoDB Server
How to mitigate CVE-2026-13066
Install security update from vendor's website.
MongoDB Server - addressed in versions 7.0.39, 8.0.28, 8.2.12, 8.3.7