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CVE-2026-22035

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Date: January 7, 2026

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.

Severity Score

Related Resources (5)

https://github.com/greenshot/greenshot/releases/tag/v1.3.311
https://nvd.nist.gov/vuln/detail/CVE-2026-22035
https://github.com/greenshot/greenshot/commit/5dedd5c9f0a9896fa0af1d4980d875a48bf432cb
https://github.com/greenshot/greenshot/security/advisories/GHSA-7hvw-q8q5-gpmj
https://www.mend.io/vulnerability-database/CVE-2026-22035

Severity Score

Weakness Type (CWE)

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CWE-78

Top Fix

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Upgrade Version

Upgrade to version https://github.com/greenshot/greenshot.git - v1.3.311

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): CHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

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