CVE-2026-26833: Mmahrous Thumbler

Critical severity, CVSS 9.8. EPSS: 3.3% chance of exploitation in the next 30 days.

thumbler through 1.1.2 allows OS command injection via the input, output, time, or size parameter in the thumbnail() function because user input is concatenated into a shell command string passed to child_process.exec() without proper sanitization or escaping.

Affected products

• Mmahrous Thumbler: up to and including 1.1.2

Published 2026-03-25. Last modified 2026-06-17.