CVE-2026-73414

CRITICALPre-NVD 9.29.2—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.9% (58th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
9.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.9%CVSS: 9.2Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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 v3
9.2
EG Score
9.2CRITICALmedium confidence
EG Risk
57
EG Risk 57/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity92% × 45%
Exploitation1% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.9%
EPSS %ILE
58th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 12, 2026

Last Modified

September 9, 2026

Advisory Details (7)

Auto-updated Sep 15, 2026
Patch available. Sources: github_commit, github_pr, github_release, github.
githubMentions a patch (unverified)

Shell injection via unescaped parentheses on Windows with CMD · Advisory · ericcornelissen/shescape · GitHub

https://github.com/ericcornelissen/shescape/security/advisories/GHSA-w4hw-qcx7-56pr
github_release Patch Available

Release v3.0.1

Patch available: ericcornelissen/shescape v3.0.1

https://github.com/ericcornelissen/shescape/releases/tag/v3.0.1
github_release Patch Available

Release v2.1.14

Patch available: ericcornelissen/shescape v2.1.14

https://github.com/ericcornelissen/shescape/releases/tag/v2.1.14
github_pr Patch Available

Improve overall escaping (v2)

Patch available: ericcornelissen/shescape v2.1.14 (PR #2651 merged 2026-07-22)

https://github.com/ericcornelissen/shescape/pull/2651
github_pr Patch Available

Improve overall escaping

Patch available: ericcornelissen/shescape v3.0.1 (PR #2649 merged 2026-07-22)

https://github.com/ericcornelissen/shescape/pull/2649
github_commit Patch Available

commit b4b34c394e7f (ericcornelissen/shescape)

Patch available: ericcornelissen/shescape v2.1.14 (contains commit b4b34c394e7f)

https://github.com/ericcornelissen/shescape/commit/b4b34c394e7f9da2775bb75381066b9a228c425f
github_commit Patch Available

commit 43d70b59d09b (ericcornelissen/shescape)

Patch available: ericcornelissen/shescape v3.0.1 (contains commit 43d70b59d09b)

https://github.com/ericcornelissen/shescape/commit/43d70b59d09bbe5c3fd02ef08b3a123e977ed9de

Vendor Advisories for CVE-2026-73414(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
shescape—
  • every version up to 2.1.14: fixed in 2.1.14
  • 3.0.0 up to 3.0.1: fixed in 3.0.1
—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 49× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 107 total refreshes for this CVE.

  1. 2026-10-09 20:07 UTCEPSS rescore
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  3. 2026-10-07 23:48 UTCEPSS rescore
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  1. 2026-09-23 17:54 UTCEPSS rescore
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Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-73414?
CVE-2026-73414 is a critical vulnerability published on August 12, 2026. 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…
When was CVE-2026-73414 disclosed?
CVE-2026-73414 was first published on August 12, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73414 actively exploited?
CVE-2026-73414 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.9% probability of exploitation in the next 30 days (58th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73414?
CVE-2026-73414 has a CVSS base score of 9.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-73414?
A fix for CVE-2026-73414 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-73414 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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