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CVE-2026-69152— brace-expansion: DoS via unbounded intermediate arrays, bypassing the CVE-2026-14257 mitigation

Quick assessment

Affected
juliangruber brace-expansion
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Julian Gruber brace-expansion是德国Julian Gruber个人开发者开源的一款字符串扩展处理脚本库。 Julian Gruber brace-expansion 1.1.18之前版本、2.1.4之前版本、3.0.6之前版本和5.0.9之前版本存在资源管理错误漏洞，该漏洞源于expand()函数在构造逗号交替中间数组或填充序列时未应用maxLength，允许攻击者通过输入导致内存耗尽或阻塞事件循环。

CVSS 7.5 · High EPSS 0.75% · P53

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 4

VendorProduct Version RangeStatus
juliangruber brace-expansion < 1.1.18 affected
>= 2.0.0, < 2.1.4 affected
>= 3.0.0, < 3.0.6 affected
>= 4.0.0, < 5.0.9 affected
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I. Basic Information for CVE-2026-69152

Vulnerability Information
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Vulnerability Title
brace-expansion: DoS via unbounded intermediate arrays, bypassing the CVE-2026-14257 mitigation
Source: CVE Program / CVE List V5
Vulnerability Description
The brace-expansion library generates arbitrary strings containing a common prefix and suffix. Prior to 1.1.18, 2.1.4, 3.0.6, and 5.0.9, expand() does not apply maxLength while constructing comma-alternative intermediate arrays or padded sequences, allowing attacker-controlled input to exhaust memory or block the event loop. The fix for CVE-2026-14257 is bypassed by the vulnerability. This issue is fixed in versions 1.1.18, 2.1.4, 3.0.6, and 5.0.9.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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
Julian Gruber brace-expansion 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Julian Gruber brace-expansion是德国Julian Gruber个人开发者开源的一款字符串扩展处理脚本库。 Julian Gruber brace-expansion 1.1.18之前版本、2.1.4之前版本、3.0.6之前版本和5.0.9之前版本存在资源管理错误漏洞，该漏洞源于expand()函数在构造逗号交替中间数组或填充序列时未应用maxLength，允许攻击者通过输入导致内存耗尽或阻塞事件循环。
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 < 1.1.18 -

II. Public POCs for CVE-2026-69152

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 7948 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
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III. Intelligence Information for CVE-2026-69152

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Patches & Fixes for CVE-2026-69152 (4)

Vendor Advisories for CVE-2026-69152 (1)

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-69152

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