---
id: CVE-2026-72590
title: >-
  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
  e…
summary: >-
  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
  e…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-93
published: '2026-08-10'
updated: '2026-08-28'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-72590'
references:
  - url: 'https://github.com/alseambusher/crontab-ui'
    label: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
  - url: 'https://github.com/alseambusher/crontab-ui/blob/master/app.js'
    label: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
tags:
  - nvd
epss: 0.02043
epssPercentile: 0.80342
ingestedAt: '2026-08-29T18:40:35.619Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.