CVE-2026-11933
Analyzed
Analyzed - Analysis Complete
Use-After-Free in MongoDB Server JavaScript Engine
Vulnerability report for CVE-2026-11933, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-06-12
Last updated on: 2026-06-22
Assigner: MongoDB, Inc.
Description
Description
A use-after-free vulnerability exists in MongoDB Server's server-side JavaScript engine when converting BSON documents to JavaScript arrays. An authenticated user with read privileges who is able to run server-side JavaScript (for example, via $where or $function) can cause the server to access memory that has already been freed. This may result in disclosure of information from the mongod process memory or a denial of service through a server crash.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| mongodb | mongodb | From 4.4.0 (inc) to 4.4.31 (exc) |
| mongodb | mongodb | From 5.0.0 (inc) to 5.0.34 (exc) |
| mongodb | mongodb | From 6.0.0 (inc) to 6.0.29 (exc) |
| mongodb | mongodb | From 7.0.0 (inc) to 7.0.37 (exc) |
| mongodb | mongodb | From 8.0.0 (inc) to 8.0.26 (exc) |
| mongodb | mongodb | From 8.2.0 (inc) to 8.2.11 (exc) |
| mongodb | mongodb | From 8.3.0 (inc) to 8.3.4 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-787 | The product writes data past the end, or before the beginning, of the intended buffer. |
| CWE-416 | The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. |
