CVE-2026-73413
Shescape: Quadratic-time denial of service in flag-protection
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-400 CWE-407 |
| Vendor | ericcornelissen |
| Product | shescape |
| Published | Aug 12, 2026 |
Stay Ahead of the Next One
Get instant alerts for ericcornelissen shescape
Be the first to know when new unknown vulnerabilities affecting ericcornelissen shescape are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
Affected Versions
ericcornelissen / shescape
>= 2.1.11, < 2.1.14 >= 3.0.0, < 3.0.1
References
github.com: https://github.com/ericcornelissen/shescape/security/advisories/GHSA-gm3r-q2wp-hw87 github.com: https://github.com/ericcornelissen/shescape/pull/2649 github.com: https://github.com/ericcornelissen/shescape/pull/2651 github.com: https://github.com/ericcornelissen/shescape/commit/43d70b59d09bbe5c3fd02ef08b3a123e977ed9de github.com: https://github.com/ericcornelissen/shescape/commit/b4b34c394e7f9da2775bb75381066b9a228c425f github.com: https://github.com/ericcornelissen/shescape/releases/tag/v2.1.14 github.com: https://github.com/ericcornelissen/shescape/releases/tag/v3.0.1