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CVE-2026-45149— brace-expansion: Large numeric range defeats documented `max` DoS protection

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2026-45149

Vulnerability Information
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Vulnerability Title
brace-expansion: Large numeric range defeats documented `max` DoS protection
Source: NVD (National Vulnerability Database)
Vulnerability Description
The brace-expansion library generates arbitrary strings containing a common prefix and suffix. From 5.0.0 to before 5.0.6, the max option was being applied too late. When expanding a single large numeric range like {1..10000000}, the sequence generation loop generates all 10 million intermediate elements before the max limit is applied With max=10, the output is correctly limited to 10 items, but the process still allocates ~505 MB and spends ~800ms building the full intermediate array. This vulnerability is fixed in 5.0.6.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
juliangruberbrace-expansion >= 5.0.0, < 5.0.6 -

II. Public POCs for CVE-2026-45149

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III. Intelligence Information for CVE-2026-45149

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Vendor Advisories for CVE-2026-45149 (1)

IV. Related Vulnerabilities

Same product: brace-expansion
Same vendor: juliangruber
Same weakness: CWE-400

V. Comments for CVE-2026-45149

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