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I. Basic Information for CVE-2026-29063
Vulnerability Information

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Vulnerability Title
Immutable.js: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in immutable
Source: NVD (National Vulnerability Database)
Vulnerability Description
Immutable.js provides many Persistent Immutable data structures. Prior to versions 3.8.3, 4.3.7, and 5.1.5, Prototype Pollution is possible in immutable via the mergeDeep(), mergeDeepWith(), merge(), Map.toJS(), and Map.toObject() APIs. This issue has been patched in versions 3.8.3, 4.3.7, and 5.1.5.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
CWE-1321
Source: NVD (National Vulnerability Database)
Vulnerability Title
Immutable collections for JavaScript 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Immutable collections for JavaScript是Immutable.js开源的一个不可变数据集合库。 Immutable collections for JavaScript 3.8.3之前版本、4.3.7之前版本和5.1.5之前版本存在安全漏洞,该漏洞源于mergeDeep等API存在原型污染问题。
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
VendorProductAffected VersionsCPESubscribe
immutable-jsimmutable-js < 3.8.3 -
II. Public POCs for CVE-2026-29063
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III. Intelligence Information for CVE-2026-29063
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IV. Related Vulnerabilities
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