Cloudanix VulnDB

CVE-2026-102277

Medium · 5.3

CVSS

5.3

EPSS

0.3%

Published

Sep 28, 2026

CISA due date

—

The record

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.

Affected packages

Ecosystem Package Introduced Fixed

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