Description
MaxKB is an open-source AI assistant for enterprise. Versions 2.7.1 and below contain a sandbox escape vulnerability in the ToolExecutor component. By leveraging Python's ctypes library to execute raw system calls, an authenticated attacker with workspace privileges can bypass the LD_PRELOAD-based sandbox.so module to achieve arbitrary code execution via direct kernel system calls, enabling full network exfiltration and container compromise. The library intercepts critical standard system functions such as execve, system, connect, and open. It also intercepts mprotect to prevent PROT_EXEC (executable memory) allocations within the sandboxed Python processes, but pkey_mprotect is not blocked. This issue has been fixed in version 2.8.0.
INFO
Published Date :
2026-04-14T00:17:10.279Z
Last Modified :
2026-04-14T16:28:08.560Z
Source :
GitHub_M
AFFECTED PRODUCTS
The following products are affected by CVE-2026-39421 vulnerability.
| Vendors | Products |
|---|---|
| 1panel |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-39421.
