CVE-2026-79918 MaxKB: Sandbox escape via unhooked fexecve
Authenticated attackers can escape the sandbox by calling fexecve, bypassing subprocess restrictions in MaxKB.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-79918?
CVE-2026-79918 is a medium-severity vulnerability in 1Panel-dev MaxKB, published on 21 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-693
Which versions are affected by CVE-2026-79918?
How do I fix CVE-2026-79918?
No fix has been published for CVE-2026-79918 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-79918 being exploited?
There is no known exploitation of CVE-2026-79918 in the wild and no public exploit code.
Sources
Also known as GHSA-9mh9-v949-fwqh.