CVE-2026-16129 princezuda SafestClaw Built-in Web shell.py ShellAction._validate_command incomplete blacklist
Incomplete blacklist in SafestClaw's shell validation allows local attackers to execute arbitrary commands via the built-in web interface.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-16129?
CVE-2026-16129 is a medium-severity command injection vulnerability in princezuda SafestClaw, published on 18 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability has been found in princezuda SafestClaw up to 4.2.4. This vulnerability affects the function ShellAction._validate_command of the file src/safestclaw/actions/shell.py of the component Built-in Web Interface. Such manipulation leads to incomplete blacklist. An attack has to be approached locally. The exploit has been disclosed to the public and may be used. The presence of this vulnerability remains uncertain at this time. The project maintainer explains: "On paper you're correct, this is a vulnerability. In practice, nothing your AI generated shows how it makes users vulnerable. It's open source. Someone can mod the shell allow list or remove that system. Present an actual poc that shows a threat to users."
Which versions are affected by CVE-2026-16129?
How do I fix CVE-2026-16129?
No fix has been published for CVE-2026-16129 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-16129 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-16129 exists.
Sources
Also known as GHSA-4ch8-fgcq-7558.