CVE-2026-22035
Greenshot Vulnerable to OS Command Injection via ExternalCommand Plugin
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.
INFO
Published Date :
Jan. 8, 2026, 1:15 a.m.
Last Modified :
Jan. 8, 2026, 7:15 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update Greenshot to version 1.3.311.
- Avoid processing filenames from untrusted sources.
- Sanitize all user-supplied filenames before use.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-22035.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-22035 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-22035
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-22035 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-22035 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jan. 08, 2026
Action Type Old Value New Value Added Reference https://github.com/greenshot/greenshot/security/advisories/GHSA-7hvw-q8q5-gpmj -
New CVE Received by [email protected]
Jan. 08, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H Added CWE CWE-78 Added Reference https://github.com/greenshot/greenshot/commit/5dedd5c9f0a9896fa0af1d4980d875a48bf432cb Added Reference https://github.com/greenshot/greenshot/releases/tag/v1.3.311 Added Reference https://github.com/greenshot/greenshot/security/advisories/GHSA-7hvw-q8q5-gpmj