Allocation of Resources Without Limits or Throttling Affecting brace-expansion package, versions <1.1.16>=2.0.0 <2.1.2>=3.0.0 <5.0.8
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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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Start learning- Snyk IDSNYK-JS-BRACEEXPANSION-18313044
- published26 Jul 2026
- disclosed23 Jul 2026
- creditbnbdr
Introduced: 23 Jul 2026
NewCVE-2026-14257 (opens in a new tab)How to fix?
Upgrade brace-expansion to version 1.1.16, 2.1.2, 5.0.8 or higher.
Overview
brace-expansion is a Brace expansion as known from sh/bash
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the expand() function and its recursive expand_ helper, which cap the number of results via the max option but do not bound the length of each result string. An attacker can crash the Node process with a fatal, uncatchable out-of-memory error by supplying a pattern that chains many brace groups, such as {a,b} repeated, keeping the result count under max while each result grows with the group count so total output scales unbounded. Exploitation requires the application to pass untrusted input to expand(), directly or transitively through minimatch or glob brace patterns.
Workaround
This vulnerability can be avoided by passing small explicit max and maxLength options to expand(), bounding both the number of results and the length of each so total output stays limited.