CVE-2026-22035: Getgreenshot Greenshot

High severity, CVSS 7.3. EPSS: 1% chance of exploitation in the next 30 days.

Greenshot is an open source Windows screenshot utility. Versions 1.3.310 and below arvulnerable to OS Command Injection through unsanitized filename processing. The FormatArguments method in ExternalCommandDestination.cs:269 uses string.Format() to insert user-controlled filenames directly into shell commands without sanitization, allowing attackers to execute arbitrary commands by crafting malicious filenames containing shell metacharacters. This issue is fixed in version 1.3.311.

Affected products

• Getgreenshot Greenshot: before 1.3.311 (fixed in 1.3.311)

Published 2026-01-08. Last modified 2026-06-17.