CVE-2026-8336
Post-authentication use-after-free error in $_internalJsEmit and mapreduce commands
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 v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.
INFO
Published Date :
May 13, 2026, 12:16 a.m.
Last Modified :
May 13, 2026, 12:16 a.m.
Remotely Exploit :
Yes !
Source :
mongodb
Affected Products
The following products are affected by CVE-2026-8336
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | a39b4221-9bd0-4244-95fc-f3e2e07f1deb | ||||
| CVSS 4.0 | HIGH | a39b4221-9bd0-4244-95fc-f3e2e07f1deb |
Solution
- Update MongoDB Server to version 7.0.34 or later.
- Update MongoDB Server to version 8.0.23 or later.
- Update MongoDB Server to version 8.2.9 or later.
- Update MongoDB Server to version 8.3.2 or later.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-8336 vulnerability anywhere in the article.