CVE-2026-72589
Received Received - Intake

Command Injection in Crontab-UI

Publication date: 2026-08-10

Last updated on: 2026-08-10

Assigner: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c

Description
An OS command injection vulnerability in alseambusher/crontab-ui through 0.4.2 allows an unauthenticated remote attacker to execute arbitrary system commands by importing a crafted crontab database file. The POST /import endpoint accepts arbitrary .db files and overwrites the application database without validation.

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Meta Information

Published
2026-08-10
Last Modified
2026-08-10
Generated
2026-08-10
AI Q&A
2026-08-10
EPSS Evaluated
N/A
NVD
CVE-2026-72589
EUVD
EUVD-2026-55217

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
alseambusher crontab-ui 0.4.2
alseambusher crontab-ui to 0.4.2 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Attack-Flow Graph

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Executive Summary

This is an OS command injection vulnerability in crontab-ui through version 0.4.2. An unauthenticated remote attacker can execute arbitrary system commands by importing a specially crafted crontab database file. The application's /import endpoint accepts arbitrary .db files without validation and overwrites the database. The hook field in the imported file is embedded directly into a shell command without sanitization, leading to command execution when the cron job runs.

Detection Guidance

Check if crontab-ui version 0.4.2 or earlier is installed. Inspect network traffic for POST requests to /import endpoint with .db file uploads. Monitor system logs for unexpected cron job executions or unauthorized commands.

Impact Analysis

An attacker could gain full control of the system where crontab-ui is running. This may allow unauthorized access, data theft, installation of malware, or disruption of services. Since the attack is unauthenticated, any internet-facing instance of crontab-ui could be exploited remotely.

Compliance Impact

This vulnerability could lead to unauthorized access and data breaches, violating GDPR's data protection requirements and HIPAA's security rules for protected health information. Organizations using affected versions may face compliance violations, legal penalties, and reputational damage.

Mitigation Strategies

Immediately stop using crontab-ui version 0.4.2 or earlier. Remove the application if possible. Block external access to the /import endpoint. Update to the latest version if a patch exists. Implement network-level controls to prevent unauthorized file uploads.

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