vulnerability
MongoDB: CVE-2026-8336: Use After Free
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 9 | (AV:N/AC:M/Au:S/C:C/I:C/A:C) | May 13, 2026 | May 21, 2026 | May 21, 2026 |
Severity
9
CVSS
(AV:N/AC:M/Au:S/C:C/I:C/A:C)
Published
May 13, 2026
Added
May 21, 2026
Modified
May 21, 2026
Description
After invoking $_internalJsEmit, which is not intended to be directly accessible, or mapreduce command’s map function in a certain way, an authenticated user can subsequently crash mongod when the server-side JavaScript engine (through $where, $function, mapreduce reduce stage, etc.) is used also in a specific way, resulting in a post-authentication denial-of-service.
This issue impacts MongoDB Server v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.
This issue impacts MongoDB Server v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.
Solutions
mongodb-upgrade-latestmongodb-upgrade-8_2_9mongodb-upgrade-8_3_2
Rapid7 Labs
2026 Global Threat Landscape Report
The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.