CVE-2026-4591 kalcaddle kodbox fileThumb Endpoint app.php checkBin os command injection
Remote attackers can execute arbitrary OS commands via the fileThumb endpoint in kodbox, leading to potential system compromise.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4591?
CVE-2026-4591 is a medium-severity command injection vulnerability in kalcaddle kodbox, published on 23 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
A weakness has been identified in kalcaddle kodbox 1.64. This affects the function checkBin of the file /workspace/source-code/plugins/fileThumb/app.php of the component fileThumb Endpoint. Executing a manipulation can lead to os command injection. The attack can be executed remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-4591?
How do I fix CVE-2026-4591?
No fix has been published for CVE-2026-4591 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-2026-4591 being exploited?
There is no known exploitation of CVE-2026-4591 in the wild and no public exploit code.
Sources
Also known as GHSA-rjfv-p85j-26xf.