CVE-2026-73413

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.

References

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

https://github.com/ericcornelissen/shescape/releases/tag/v3.0.1

https://github.com/ericcornelissen/shescape/releases/tag/v2.1.14

https://github.com/ericcornelissen/shescape/pull/2651

https://github.com/ericcornelissen/shescape/pull/2649

https://github.com/ericcornelissen/shescape/commit/b4b34c394e7f9da2775bb75381066b9a228c425f

https://github.com/ericcornelissen/shescape/commit/43d70b59d09bbe5c3fd02ef08b3a123e977ed9de

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4