CVE-2026-72590 alseambusher crontab-ui - Unauthenticated RCE via Newline Injection in env_vars Parameter
Unauthenticated attackers can execute arbitrary OS commands by injecting newlines into the env_vars parameter of the crontab-ui web interface.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-72590?
CVE-2026-72590 is a critical command injection vulnerability in alseambusher crontab-ui, published on 10 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An OS command injection vulnerability in alseambusher/crontab-ui through 0.4.2 allows an unauthenticated remote attacker to inject arbitrary cron job entries by sending a crafted GET request to /crontab with URL-encoded newlines in the env_vars parameter.
Weakness: CWE-93
Which versions are affected by CVE-2026-72590?
How do I fix CVE-2026-72590?
No fix has been published for CVE-2026-72590 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-2026-72590 being exploited?
There is no known exploitation of CVE-2026-72590 in the wild and no public exploit code.
Sources
Also known as GHSA-25qx-69jj-jfcj.