CVE-2026-73413

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6% (46th 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
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 8.7Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Shescape is a simple shell escape library for JavaScript. From 2.1.11 until 2.1.14 and 3.0.1, the flag-protection loop in compose in src/internal/compose.js repeatedly joins and slices flag fragments when flagProtection is enabled, which is the default, making processing quadratic in input size across the escape, escapeAll, quote, and quoteAll APIs. An attacker who can supply a large untrusted input containing many flag fragments can consume CPU and cause denial of service. This issue is fixed in versions 2.1.14 and 3.0.1.

CVSS v3
8.7
EG Score
8.7HIGHmedium confidence
EG Risk
54
EG Risk 54/100CISA 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
Severity87% × 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
0.6%
EPSS %ILE
46th
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 partial (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 Aug 12, 2026
Patch available. Sources: github_commit, github_release, github, github_pr.
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_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
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
githubMentions a patch (unverified)

Quadratic-time denial of service in Shescape flag-protection · Advisory · ericcornelissen/shescape · GitHub

https://github.com/ericcornelissen/shescape/security/advisories/GHSA-gm3r-q2wp-hw87

Vendor Advisories for CVE-2026-73413(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—
  • 2.1.11 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 / 47× 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 104 total refreshes for this CVE.

  1. 2026-10-09 20:07 UTCEPSS rescore
  2. 2026-10-08 17:13 UTCEPSS rescore
  3. 2026-10-07 23:48 UTCEPSS rescore
  4. 2026-10-07 01:22 UTCEG score recompute
  5. 2026-10-06 15:18 UTCEPSS rescore
  6. 2026-10-06 14:12 UTCEG score recompute
  7. 2026-10-05 17:43 UTCEPSS rescore
  8. 2026-10-05 14:44 UTCEG score recompute
  9. 2026-10-04 23:22 UTCEPSS rescore
  10. 2026-10-03 19:56 UTCEG score recompute
  11. 2026-10-03 14:26 UTCEPSS rescore
  12. 2026-10-02 19:23 UTCEG score recompute
  13. 2026-10-02 08:18 UTCEG score recompute
  14. 2026-10-01 19:50 UTCEPSS rescore
  15. 2026-09-30 21:53 UTCEG score recompute
  16. 2026-09-29 15:24 UTCEPSS rescore
  17. 2026-09-29 04:29 UTCEG score recompute
  18. 2026-09-28 13:52 UTCEPSS rescore
  19. 2026-09-28 01:17 UTCEG score recompute
  20. 2026-09-27 13:48 UTCEPSS rescore
  21. 2026-09-27 09:52 UTCEG score recompute
  22. 2026-09-26 15:59 UTCEPSS rescore
  23. 2026-09-25 03:39 UTCEG score recompute
  24. 2026-09-23 20:53 UTCEG score recompute
  25. 2026-09-23 17:54 UTCEPSS rescore
Show 75 more
  1. 2026-09-22 21:05 UTCEG score recompute
  2. 2026-09-22 08:14 UTCEG score recompute
  3. 2026-09-21 21:09 UTCEPSS rescore
  4. 2026-09-20 21:24 UTCEG score recompute
  5. 2026-09-20 20:16 UTCEPSS rescore
  6. 2026-09-19 23:11 UTCEG score recompute
  7. 2026-09-18 22:47 UTCEG score recompute
  8. 2026-09-18 19:28 UTCEPSS rescore
  9. 2026-09-18 00:31 UTCEG score recompute
  10. 2026-09-17 00:17 UTCEG score recompute
  11. 2026-09-16 14:08 UTCEPSS rescore
  12. 2026-09-16 12:16 UTCEG score recompute
  13. 2026-09-16 05:15 UTCEPSS rescore
  14. 2026-09-15 13:10 UTCEG score recompute
  15. 2026-09-15 03:12 UTCEPSS rescore
  16. 2026-09-14 01:24 UTCEG score recompute
  17. 2026-09-12 16:08 UTCEG score recompute
  18. 2026-09-12 15:02 UTCEPSS rescore
  19. 2026-09-11 17:57 UTCEG score recompute
  20. 2026-09-11 14:53 UTCEPSS rescore
  21. 2026-09-10 19:46 UTCEG score recompute
  22. 2026-09-10 09:35 UTCEPSS rescore
  23. 2026-09-09 05:12 UTCEG score recompute
  24. 2026-09-08 22:01 UTCEPSS rescore
  25. 2026-09-07 16:41 UTCEG score recompute
  26. 2026-09-06 22:13 UTCEG score recompute
  27. 2026-09-06 13:48 UTCEPSS rescore
  28. 2026-09-06 00:01 UTCEG score recompute
  29. 2026-09-05 00:40 UTCEG score recompute
  30. 2026-09-04 12:31 UTCEG score recompute
  31. 2026-09-04 05:07 UTCEPSS rescore
  32. 2026-09-02 23:26 UTCEG score recompute
  33. 2026-09-02 14:12 UTCEPSS rescore
  34. 2026-09-01 22:43 UTCEG score recompute
  35. 2026-09-01 13:54 UTCEPSS rescore
  36. 2026-09-01 11:38 UTCEG score recompute
  37. 2026-09-01 04:40 UTCEPSS rescore
  38. 2026-09-01 04:40 UTCEPSS rescore
  39. 2026-08-31 05:51 UTCEG score recompute
  40. 2026-08-30 19:18 UTCEPSS rescore
  41. 2026-08-30 19:17 UTCEPSS rescore
  42. 2026-08-30 07:40 UTCEG score recompute
  43. 2026-08-30 01:22 UTCEPSS rescore
  44. 2026-08-29 08:32 UTCEG score recompute
  45. 2026-08-28 21:42 UTCEPSS rescore
  46. 2026-08-27 23:41 UTCEG score recompute
  47. 2026-08-27 14:25 UTCEPSS rescore
  48. 2026-08-27 01:27 UTCEG score recompute
  49. 2026-08-26 14:47 UTCEPSS rescore
  50. 2026-08-25 16:04 UTCEG score recompute
  51. 2026-08-25 13:49 UTCEPSS rescore
  52. 2026-08-24 17:52 UTCEG score recompute
  53. 2026-08-23 08:37 UTCEG score recompute
  54. 2026-08-23 00:19 UTCEPSS rescore
  55. 2026-08-22 10:27 UTCEG score recompute
  56. 2026-08-21 23:49 UTCEPSS rescore
  57. 2026-08-21 01:10 UTCEG score recompute
  58. 2026-08-20 22:56 UTCEPSS rescore
  59. 2026-08-20 02:43 UTCEG score recompute
  60. 2026-08-19 17:04 UTCEPSS rescore
  61. 2026-08-18 17:24 UTCEG score recompute
  62. 2026-08-18 13:49 UTCEPSS rescore
  63. 2026-08-18 13:49 UTCEPSS rescore
  64. 2026-08-17 19:13 UTCEG score recompute
  65. 2026-08-17 13:47 UTCEPSS rescore
  66. 2026-08-16 21:02 UTCEG score recompute
  67. 2026-08-16 14:56 UTCEPSS rescore
  68. 2026-08-16 14:56 UTCEPSS rescore
  69. 2026-08-16 09:57 UTCEG score recompute
  70. 2026-08-16 02:15 UTCEPSS rescore
  71. 2026-08-15 11:47 UTCEG score recompute
  72. 2026-08-15 01:31 UTCEPSS rescore
  73. 2026-08-14 02:31 UTCEG score recompute
  74. 2026-08-13 22:00 UTCEPSS rescore
  75. 2026-08-13 15:26 UTCEG score recompute

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-73413?
CVE-2026-73413 is a high vulnerability published on August 12, 2026. Shescape is a simple shell escape library for JavaScript. From 2.1.11 until 2.1.14 and 3.0.1, the flag-protection loop in compose in src/internal/compose.js repeatedly joins and slices flag fragments when flagProtection is enabled, which is the default, making processing quadratic in input size…
When was CVE-2026-73413 disclosed?
CVE-2026-73413 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-2026-73413 actively exploited?
CVE-2026-73413 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (46th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73413?
CVE-2026-73413 has a CVSS base score of 8.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-73413?
A fix for CVE-2026-73413 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-73413 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-73413

Explore →

Is Your Infrastructure Affected by CVE-2026-73413?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs