CVE-2026-43990 JunoClaw: plugin-shell shell-metacharacter injection via shell wrapper
Attackers can execute arbitrary commands by injecting shell metacharacters into agent-supplied arguments in the JunoClaw plugin-shell component.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-43990?
CVE-2026-43990 is a high-severity command injection vulnerability in Dragonmonk111 junoclaw, published on 12 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
JunoClaw is an agentic AI platform built on Juno Network. Prior to 0.x.y-security-1, plugin-shell's run_command wrapped every agent-supplied command in 'sh -c' / 'cmd /C' and passed the full argument string to the shell's parser, allowing shell metacharacters in agent-supplied arguments to be interpreted as command syntax. This vulnerability is fixed in 0.x.y-security-1.
Which versions are affected by CVE-2026-43990?
How do I fix CVE-2026-43990?
No fix has been published for CVE-2026-43990 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-2026-43990 being exploited?
There is no known exploitation of CVE-2026-43990 in the wild and no public exploit code.
Sources
Also known as GHSA-gpvm-3chf-2649.