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.
Published: 2026-08-10
Score: 9.8 Critical
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories

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History

Mon, 10 Aug 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 10 Aug 2026 12:00:00 +0000

Type Values Removed Values Added
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. The handler appends the env_vars value directly to the crontab file string as '${envVars}\n' without stripping newline characters, enabling an attacker to insert arbitrary cron expressions that execute attacker-controlled commands. 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.

Mon, 10 Aug 2026 11:00:00 +0000

Type Values Removed Values Added
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. The handler appends the env_vars value directly to the crontab file string as '${envVars}\n' without stripping newline characters, enabling an attacker to insert arbitrary cron expressions that execute attacker-controlled commands.
Title alseambusher crontab-ui - Unauthenticated RCE via Newline Injection in env_vars Parameter
Weaknesses CWE-93
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}


Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: TuranSec

Published:

Updated: 2026-08-10T13:23:34.292Z

Reserved: 2026-08-10T10:32:53.855Z

Link: CVE-2026-72590

cve-icon Vulnrichment

Updated: 2026-08-10T13:23:28.792Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-10T20:30:05Z

Weaknesses