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OpenAdvisories
High · 7.8 CVE-2026-22035 EUVD-2026-1663

Greenshot Vulnerable to OS Command Injection via ExternalCommand Plugin

Published Jan 8, 2026 · Updated Feb 26, 2026 · Assigned by GitHub_M

Description

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

VendorProductAffectedFixed
greenshot greenshot < 1.3.311 —

References