CVE-2026-102277
CVE-2026-102277 updated by NVD
Summary
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 | Affected versions | Fixed versions |
|---|---|---|---|
| npm | brace-expansion | — | 1.1.21 |
| npm | brace-expansion | — | 5.0.12, 3.0.9, 2.1.7, 1.1.21 |
Remediation: Upgrade to 5.0.12 or later.
References
Includes data from the GitHub Advisory Database, licensed under CC-BY 4.0.
Includes data from the National Vulnerability Database (NIST). NVD data is in the public domain; this page is not endorsed by NIST.
Includes data from OSV.dev.
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EPSS scores provided by the FIRST.org Exploit Prediction Scoring System.