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: 0.5%, top 57% of all CVEs by exploit prediction. 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: 1%CVSS: 9.2Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
9.2(medium)
EG Risk
57(Track)
EG Risk 57/100SSVC: Track

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%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
43%
KEV
Not listed

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.
github Patch Available

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 rangeFixed inDependents
shescape—3.0.1—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 54× 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.

  1. 2026-09-18 22:11 UTCEG score recompute
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-17 22:28 UTCEG score recompute
  4. 2026-09-17 00:17 UTCEG score recompute
  5. 2026-09-16 14:08 UTCEPSS rescore
  6. 2026-09-16 05:34 UTCEG score recompute
  7. 2026-09-16 05:15 UTCEPSS rescore
  8. 2026-09-15 06:38 UTCEG score recompute
  9. 2026-09-15 03:12 UTCEPSS rescore
  10. 2026-09-13 19:40 UTCEG score recompute
  11. 2026-09-12 17:25 UTCEG score recompute
  12. 2026-09-12 15:02 UTCEPSS rescore
  13. 2026-09-11 18:09 UTCEG score recompute
  14. 2026-09-11 14:53 UTCEPSS rescore
  15. 2026-09-11 13:46 UTCEG score recompute
  16. 2026-09-10 12:33 UTCEG score recompute
  17. 2026-09-10 09:35 UTCEPSS rescore
  18. 2026-09-09 05:12 UTCEG score recompute
  19. 2026-09-08 22:01 UTCEPSS rescore
  20. 2026-09-07 16:41 UTCEG score recompute
  21. 2026-09-06 16:42 UTCEG score recompute
  22. 2026-09-06 13:48 UTCEPSS rescore
  23. 2026-09-05 18:42 UTCEG score recompute
  24. 2026-09-04 16:43 UTCEG score recompute
  25. 2026-09-04 07:53 UTCEG score recompute
Show 50 more
  1. 2026-09-04 05:07 UTCEPSS rescore
  2. 2026-09-02 23:26 UTCEG score recompute
  3. 2026-09-02 14:12 UTCEPSS rescore
  4. 2026-09-01 16:29 UTCEG score recompute
  5. 2026-09-01 13:54 UTCEPSS rescore
  6. 2026-09-01 06:43 UTCEG score recompute
  7. 2026-09-01 04:40 UTCEPSS rescore
  8. 2026-09-01 04:40 UTCEPSS rescore
  9. 2026-08-30 22:54 UTCEG score recompute
  10. 2026-08-30 19:18 UTCEPSS rescore
  11. 2026-08-30 19:17 UTCEPSS rescore
  12. 2026-08-30 05:23 UTCEG score recompute
  13. 2026-08-30 01:22 UTCEPSS rescore
  14. 2026-08-29 08:32 UTCEG score recompute
  15. 2026-08-28 21:42 UTCEPSS rescore
  16. 2026-08-27 16:45 UTCEG score recompute
  17. 2026-08-27 14:25 UTCEPSS rescore
  18. 2026-08-26 18:48 UTCEG score recompute
  19. 2026-08-26 14:47 UTCEPSS rescore
  20. 2026-08-25 15:26 UTCEG score recompute
  21. 2026-08-25 13:49 UTCEPSS rescore
  22. 2026-08-24 17:16 UTCEG score recompute
  23. 2026-08-24 12:17 UTCEG score recompute
  24. 2026-08-23 01:18 UTCEG score recompute
  25. 2026-08-23 00:19 UTCEPSS rescore
  26. 2026-08-22 03:28 UTCEG score recompute
  27. 2026-08-21 23:49 UTCEPSS rescore
  28. 2026-08-21 01:11 UTCEG score recompute
  29. 2026-08-20 22:56 UTCEPSS rescore
  30. 2026-08-19 18:35 UTCEG score recompute
  31. 2026-08-19 17:04 UTCEPSS rescore
  32. 2026-08-18 15:13 UTCEG score recompute
  33. 2026-08-18 13:49 UTCEPSS rescore
  34. 2026-08-18 13:49 UTCEPSS rescore
  35. 2026-08-17 15:52 UTCEG score recompute
  36. 2026-08-17 13:47 UTCEPSS rescore
  37. 2026-08-16 18:01 UTCEG score recompute
  38. 2026-08-16 14:56 UTCEPSS rescore
  39. 2026-08-16 14:56 UTCEPSS rescore
  40. 2026-08-16 04:55 UTCEG score recompute
  41. 2026-08-16 02:15 UTCEPSS rescore
  42. 2026-08-15 02:43 UTCEG score recompute
  43. 2026-08-15 01:31 UTCEPSS rescore
  44. 2026-08-14 22:18 UTCEG score recompute
  45. 2026-08-14 22:14 UTCEG score recompute
  46. 2026-08-13 22:32 UTCEG score recompute
  47. 2026-08-13 22:00 UTCEPSS rescore
  48. 2026-08-12 20:19 UTCEG score recompute
  49. 2026-08-12 19:46 UTCEG score recompute
  50. 2026-08-12 19:45 UTCMITRE cvelistV5first tracked

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 in the National Vulnerability Database 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 1% probability of exploitation in the next 30 days, which ranks it in the top 56.6% of all scored CVEs.
What is the CVSS score of CVE-2026-73414?
CVE-2026-73414 has a CVSS v3 base score of 9.2 (NVD).
How do I remediate CVE-2026-73414?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73414, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-73414

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