CVE-2026-72590 PUBLISHED

alseambusher crontab-ui - Unauthenticated RCE via Newline Injection in env_vars Parameter

Assigner: TuranSec
Reserved: 10.08.2026 Published: 10.08.2026 Updated: 10.08.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 9.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	alseambusher
Product	crontab-ui
Versions	Default: unknown affected from 0 to 0.4.2 (incl.)

Credits

Shaxriyor Abdullayev (Kamol_cs) finder

References

Product
Vulnerable File

Problem Types

CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection') CWE