CVE-2026-25547: @isaacs/brace-expansion has Uncontrolled Resource Consumption

February 3, 2026 (updated February 5, 2026)

@isaacs/brace-expansion is vulnerable to a Denial of Service (DoS) issue caused by unbounded brace range expansion. When an attacker provides a pattern containing repeated numeric brace ranges, the library attempts to eagerly generate every possible combination synchronously. Because the expansion grows exponentially, even a small input can consume excessive CPU and memory and may crash the Node.js process.

References

github.com/advisories/GHSA-7h2j-956f-4vf2
github.com/isaacs/brace-expansion
github.com/isaacs/brace-expansion/security/advisories/GHSA-7h2j-956f-4vf2
nvd.nist.gov/vuln/detail/CVE-2026-25547

Code Behaviors & Features

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