Medium severity · published Sep 21, 2026
CVE-2026-79918
MaxKB: Sandbox escape via unhooked fexecve
6.3
CVSS
0.4%
EPSS
No
On KEV
Description
MaxKB is an open-source AI assistant for enterprise. Prior to version 2.10.6-lts, the ToolExecutor LD_PRELOAD sandbox hooks execve, execvpe, and execveat to prevent subprocess creation but does not hook fexecve. An authenticated attacker able to execute tool code can call fexecve to start a process outside the sandbox's intended subprocess policy. This issue is fixed in version 2.10.6-lts.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
MaxKB · 1Panel-dev
< 2.10.6-lts · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-79918
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-79918
github.com
https://github.com/1Panel-dev/MaxKB/commit/6fa7947a85030b87977c4026f33af11ca10dd1e6
github.com
https://github.com/1Panel-dev/MaxKB/releases/tag/v2.10.6-lts
github.com
https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-9mh9-v949-fwqh
More from MaxKB
10.0
CVE-2026-77521
MaxKB: Prompt-injectable agent can lead to command execution
10.0
CVE-2025-66419
MaxKB vulnerable to privilege escalation through sandbox bypass
9.8
CVE-2025-53928
MaxKB has RCE in MCP call
9.1
CVE-2026-79916
MaxKB AWS Bedrock model credential injection leads to remote code execution
8.8
CVE-2026-54149
MaxKB MCP tool import validation bypass allows post-authentication remote code execution