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: 0.3%, top 74% 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
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%CVSS: 8.7Exploit: 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. 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
8.7(medium)
EG Risk
54(Track)
EG Risk 54/100SSVC: 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
Severity87% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

August 12, 2026

Last Modified

August 13, 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
github Patch Available

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 rangeFixed inDependents
shescape—2.1.14—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 30× 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. 2026-08-25 16:04 UTCEG score recompute
  2. 2026-08-25 13:49 UTCEPSS rescore
  3. 2026-08-24 17:52 UTCEG score recompute
  4. 2026-08-23 08:37 UTCEG score recompute
  5. 2026-08-23 00:19 UTCEPSS rescore
  6. 2026-08-22 10:27 UTCEG score recompute
  7. 2026-08-21 23:49 UTCEPSS rescore
  8. 2026-08-21 01:10 UTCEG score recompute
  9. 2026-08-20 22:56 UTCEPSS rescore
  10. 2026-08-20 02:43 UTCEG score recompute
  11. 2026-08-19 17:04 UTCEPSS rescore
  12. 2026-08-18 17:24 UTCEG score recompute
  13. 2026-08-18 13:49 UTCEPSS rescore
  14. 2026-08-18 13:49 UTCEPSS rescore
  15. 2026-08-17 19:13 UTCEG score recompute
  16. 2026-08-17 13:47 UTCEPSS rescore
  17. 2026-08-16 21:02 UTCEG score recompute
  18. 2026-08-16 14:56 UTCEPSS rescore
  19. 2026-08-16 14:56 UTCEPSS rescore
  20. 2026-08-16 09:57 UTCEG score recompute
  21. 2026-08-16 02:15 UTCEPSS rescore
  22. 2026-08-15 11:47 UTCEG score recompute
  23. 2026-08-15 01:31 UTCEPSS rescore
  24. 2026-08-14 02:31 UTCEG score recompute
  25. 2026-08-13 22:00 UTCEPSS rescore
Show 5 more
  1. 2026-08-13 15:26 UTCEG score recompute
  2. 2026-08-13 15:15 UTCEG score recompute
  3. 2026-08-12 20:19 UTCEG score recompute
  4. 2026-08-12 19:46 UTCEG score recompute
  5. 2026-08-12 19:45 UTCMITRE cvelistV5first tracked

Related CVEs(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 in the National Vulnerability Database on August 12, 2026, with the most recent update on August 13, 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% probability of exploitation in the next 30 days, which ranks it in the top 74.0% of all scored CVEs.
What is the CVSS score of CVE-2026-73413?
CVE-2026-73413 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-73413?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73413, 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

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