Node.js CVE-2026-25547
GHSA-7h2j-956f-4vf2
Lifecycle Timeline
3Blast Radius
ecosystem impact- 1,340 npm packages depend on @isaacs/brace-expansion (231 direct, 1,109 indirect)
Ecosystem-wide dependent count for version 5.0.1.
DescriptionCVE.org
@isaacs/brace-expansion is a hybrid CJS/ESM TypeScript fork of brace-expansion. Prior to version 5.0.1, @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. This issue has been patched in version 5.0.1.
AnalysisAI
@isaacs/brace-expansion is a hybrid CJS/ESM TypeScript fork of brace-expansion. Prior to version 5.0.1, @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...
Technical ContextAI
This vulnerability (CWE-1333: Inefficient Regular Expression Complexity (ReDoS)) affects isaacs/brace-expansion is a hybrid CJS/ESM TypeScript fork of brace-expansion.. @isaacs/brace-expansion is a hybrid CJS/ESM TypeScript fork of brace-expansion. Prior to version 5.0.1, @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 No
Affected ProductsAI
Product: isaacs/brace-expansion is a hybrid CJS/ESM TypeScript fork of brace-expansion.. Versions: up to 5.0.1.
RemediationAI
Fixed in version 5.0.1..
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External POC / Exploit Code
Leaving vuln.today