ericcornelissen Shescape up to 2.1.13/3.0.0 src/internal/win/cmd.js getEscapeFunction os command injection

Summaryinfo

A vulnerability classified as critical has been found in ericcornelissen Shescape up to 2.1.13/3.0.0. The affected element is the function getEscapeFunction of the file src/internal/win/cmd.js. Performing a manipulation results in os command injection. This vulnerability is identified as CVE-2026-73414. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical has been found in ericcornelissen Shescape up to 2.1.13/3.0.0. This affects the function getEscapeFunction of the file src/internal/win/cmd.js. The manipulation with an unknown input leads to a os command injection vulnerability. CWE is classifying the issue as CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Shescape is a simple shell escape library for JavaScript. Prior to 2.1.14 and 3.0.1, getEscapeFunction in src/internal/win/cmd.js does not escape `(` and `)` when applications use the escape or escapeAll APIs on Windows with shell set to cmd.exe, or with shell set to true when CMD is the default. An attacker-controlled argument can break out of a parenthesized CMD construct and inject shell syntax depending on the original command, resulting in arbitrary command execution. This issue is fixed in versions 2.1.14 and 3.0.1.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-73414 since 08/12/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1202 for this issue.

Upgrading to version 2.1.14 or 3.0.1 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• ericcornelissen

Name

• Shescape

Version

• 2.1.0
• 2.1.1
• 2.1.2
• 2.1.3
• 2.1.4
• 2.1.5
• 2.1.6
• 2.1.7
• 2.1.8
• 2.1.9
• 2.1.10
• 2.1.11
• 2.1.12
• 2.1.13
• 3.0

Website

• Product: https://github.com/ericcornelissen/shescape/

CPE 2.3info

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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