CVE-2026-6594— brikcss merge prototype pollution
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I. Basic Information for CVE-2026-6594
Vulnerability Information
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Vulnerability Title
brikcss merge prototype pollution
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability was determined in brikcss merge up to 1.3.0. This affects an unknown part. Executing a manipulation of the argument __proto__/constructor.prototype/prototype can lead to improperly controlled modification of object prototype attributes. The attack may be performed from remote. The vendor was contacted early about this disclosure but did not respond in any way.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
CWE-1321
Source: NVD (National Vulnerability Database)
Vulnerability Title
merge 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
merge是brikcss开源的一个递归合并 JavaScript 对象的工具。 merge 1.3.0及之前版本存在安全漏洞，该漏洞源于对参数__proto__/constructor.prototype/prototype的操作不当，可能导致对象原型属性被不当修改。
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
II. Public POCs for CVE-2026-6594
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- Submit #791805: brikcss @brikcss/merge 1.3.0 Prototype Pollutionthird-party-advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-6594
IV. Related Vulnerabilities
Same weakness: CWE-1321
- CVE-2026-42264
Axios: Prototype pollution read-side gadgets in HTTP adapter - CVE-2026-42232
n8n: XML Node Prototype Pollution to RCE - CVE-2026-42231
n8n: Prototype Pollution in XML Webhook Body Parser Leads to - CVE-2026-42077
Evolver: Prototype Pollution via `Object.assign()` in mailbo - CVE-2026-42033
Axios: Prototype Pollution Gadgets - Response Tampering, Dat
V. Comments for CVE-2026-6594
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