# CVE-2026-73414

## Summary

- **CVE ID:** CVE-2026-73414
- **Severity:** CRITICAL
- **CVSS Score:** 9.2 (CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-78, CWE-150
- **Published:** Aug 12, 2026
- **Last Modified:** Aug 14, 2026

## Description

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.

## Affected Products

- ericcornelissen — shescape (< 2.1.14)
- ericcornelissen — shescape (>= 3.0.0, < 3.0.1)

## References

- [CNA](https://github.com/ericcornelissen/shescape/security/advisories/GHSA-w4hw-qcx7-56pr)
- [CNA](https://github.com/ericcornelissen/shescape/pull/2649)
- [CNA](https://github.com/ericcornelissen/shescape/pull/2651)
- [CNA](https://github.com/ericcornelissen/shescape/commit/43d70b59d09bbe5c3fd02ef08b3a123e977ed9de)
- [CNA](https://github.com/ericcornelissen/shescape/commit/b4b34c394e7f9da2775bb75381066b9a228c425f)
- [CNA](https://github.com/ericcornelissen/shescape/releases/tag/v2.1.14)
- [CNA](https://github.com/ericcornelissen/shescape/releases/tag/v3.0.1)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.52%
- **EPSS Percentile:** 42.8

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._