CVE-2026-73414Shescape: Shell injection via unescaped parentheses on Windows with CMD
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 9.2 CRITICAL (v4.0, CNA)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
- Weakness (CWE)
- CWE-78, CWE-150
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Aug 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
ericcornelissen shescape ericcornelissen:shescape (from the name) | before 2.1.14; from 3.0.0, < 3.0.1 | CNA record |
References
- https://github.com/ericcornelissen/shescape/security/advisories/GHSA-w4hw-qcx7-56prx-refsource-confirm
- https://github.com/ericcornelissen/shescape/pull/2649x-refsource-misc
- https://github.com/ericcornelissen/shescape/pull/2651x-refsource-misc
- https://github.com/ericcornelissen/shescape/commit/43d70b59d09bbe5c3fd02ef08b3a123e977ed9dex-refsource-misc
- https://github.com/ericcornelissen/shescape/commit/b4b34c394e7f9da2775bb75381066b9a228c425fx-refsource-misc
- https://github.com/ericcornelissen/shescape/releases/tag/v2.1.14x-refsource-misc
- https://github.com/ericcornelissen/shescape/releases/tag/v3.0.1x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.