Vulnerability · Published Aug 10, 2026 · Assigned by TuranSec
CVE-2026-72590alseambusher crontab-ui - Unauthenticated RCE via Newline Injection in env_vars Parameter
Critical 9.8
In plain English
A critical-severity security flaw in crontab-ui from alseambusher. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.0% (higher than 81% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)2.0%top 18.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| alseambusher | crontab-ui | 0 – through 0.4.2 |
Weakness: CWE-93 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- Product third-party-advisory
- Vulnerable File technical-description