High 8.7Published Aug 12, 2026

CVE-2026-73413Shescape: Quadratic-time denial of service in flag-protection

Updated under an hour ago (2026-10-19 07:23 UTC)

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Every CVE for ericcornelissen shescape

Exploited in the last 30 days

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: 8.7 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness (CWE): CWE-400, CWE-407
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 13, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

ericcornelissen shescape ericcornelissen:shescape (from the name)	from 2.1.11, < 2.1.14; from 3.0.0, < 3.0.1	CNA record

References

https://github.com/ericcornelissen/shescape/security/advisories/GHSA-gm3r-q2wp-hw87x-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.