Inefficient Algorithmic Complexity Affecting brace-expansion package, versions <5.0.7
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-BRACEEXPANSION-17706650
- published30 Jun 2026
- disclosed30 Jun 2026
- creditUnknown
Introduced: 30 Jun 2026
NewCVE-2026-13149 (opens in a new tab)How to fix?
Upgrade brace-expansion to version 5.0.7 or higher.
Overview
brace-expansion is a Brace expansion as known from sh/bash
Affected versions of this package are vulnerable to Inefficient Algorithmic Complexity via the expand function. An attacker can cause excessive CPU consumption and block the event loop by supplying a specially crafted string containing multiple consecutive non-expanding '{}' brace groups. The max option does not prevent this issue, as it only limits the output size and not the computational workload.