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Vulnerability record · CVE-2026-73414 · published 12 August 2026

CVE-2026-73414: OS command injection vulnerability

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.

9.2 CVSS 4.0 Critical EPSS 0.89% · top 42.3% CWE-78 · OS command injectionCWE-150 · CWE-150 Deferred
9.2CVSS 4.0 base score
0.89%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
7References
9 Sep 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-73414), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.