Uncontrolled recursion in MongoDB - CVE-2026-1849
Published: February 13, 2026
Vulnerability identifier: #VU122801
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: CVE-2026-1849
CWE-ID: CWE-674
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: MongoDB, Inc.
Affected software:
MongoDB
MongoDB
Detailed vulnerability description
The vulnerability allows a remote user to perform a denial of service attack.
The vulnerability exists due to resource exhaustion while evaluating expressions that produce deeply nested documents. A remote user can force the server to consume all available memory resources and perform a denial of service attack.
How to mitigate CVE-2026-1849
Install updates from vendor's website.