Resource Exhaustion Affecting unleash package, versions <8.2.0-r3


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.3% (21st percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-CHAINGUARDLATEST-UNLEASH-20377843
  • published2 Oct 2026
  • disclosed28 Sept 2026

Introduced: 28 Sep 2026

NewCVE-2026-102277  (opens in a new tab)
CWE-400  (opens in a new tab)
CWE-407  (opens in a new tab)

How to fix?

Upgrade Chainguard unleash to version 8.2.0-r3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream unleash package and not the unleash package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

The brace-expansion library generates arbitrary strings containing a common prefix and suffix. Prior to 1.1.21, 2.1.7, 3.0.9, and 5.0.12, the expand function handles untrusted {a},b}-shaped patterns with many trailing closing braces by restarting its scan once for each trailing closing brace. The successive full-input rescans with linear working-string growth cause quadratic CPU time and memory pressure that can block the Node.js event loop. The process eventually recovers, making the impact a recoverable CPU denial of service. This issue is fixed in versions 1.1.21, 2.1.7, 3.0.9, and 5.0.12.

CVSS Base Scores

version 3.1