Vulnerability Description
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.
Related Weaknesses (CWE)
References
- https://github.com/ericcornelissen/shescape/commit/43d70b59d09bbe5c3fd02ef08b3a1
- https://github.com/ericcornelissen/shescape/commit/b4b34c394e7f9da2775bb75381066
- https://github.com/ericcornelissen/shescape/pull/2649
- https://github.com/ericcornelissen/shescape/pull/2651
- https://github.com/ericcornelissen/shescape/releases/tag/v2.1.14
- https://github.com/ericcornelissen/shescape/releases/tag/v3.0.1
- https://github.com/ericcornelissen/shescape/security/advisories/GHSA-gm3r-q2wp-h
FAQ
What is CVE-2026-73413?
CVE-2026-73413 is a documented vulnerability. 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 ...
How severe is CVE-2026-73413?
CVSS scoring is not yet available for CVE-2026-73413. Check NVD for updates.
Is there a patch for CVE-2026-73413?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.