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CVE-2026-13149

Quick assessment

Affected
juliangruber brace-expansion
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

juliangruber brace-expansion是juliangruber的npm 包。 juliangruber brace-expansion 5.0.6及之前版本存在资源管理错误漏洞，该漏洞源于expand()函数在处理连续非扩展'{}'大括号组时呈指数时间复杂性，可能导致攻击者通过传递特制字符串直接或间接调用expand()，造成显著的CPU消耗和事件循环阻塞。

AI Predicted 7.5 Difficulty: Easy EPSS 0.36% · P29

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProduct Version RangeStatus
juliangruber brace-expansion ≤ 5.0.6 affected
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I. Basic Information for CVE-2026-13149

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
brace-expansion through 5.0.6 is vulnerable to denial of service. The expand() function exhibits exponential-time complexity in the number of consecutive non-expanding '{}' brace groups. An attacker who passes a crafted string to expand(), directly or transitively, can cause significant CPU consumption and event-loop blocking. The max option does not mitigate this, as it bounds the output size rather than the recursion work.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/S:N/AU:Y/R:U/V:D/RE:M/U:Amber
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
juliangruber brace-expansion 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
juliangruber brace-expansion是juliangruber的npm 包。 juliangruber brace-expansion 5.0.6及之前版本存在资源管理错误漏洞，该漏洞源于expand()函数在处理连续非扩展'{}'大括号组时呈指数时间复杂性，可能导致攻击者通过传递特制字符串直接或间接调用expand()，造成显著的CPU消耗和事件循环阻塞。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
juliangruber brace-expansion 0 ~ 5.0.6 -

II. Public POCs for CVE-2026-13149

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III. Intelligence Information for CVE-2026-13149

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Patches & Fixes for CVE-2026-13149 (1)

IV. Related Vulnerabilities

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