CVE-2026-29063 (GCVE-0-2026-29063)
Vulnerability from cvelistv5
Published
2026-03-06 18:25
Modified
2026-03-06 19:33
Severity ?
8.7 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CWE
  • CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Summary
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.
References
Impacted products
Vendor Product Version
immutable-js immutable-js Version: < 3.8.3
Version: < 4.3.7
Version: < 5.1.5
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                "role": "CISA Coordinator",
                "timestamp": "2026-03-06T19:32:37.694711Z",
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            "attackRequirements": "NONE",
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            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
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            "subConfidentialityImpact": "NONE",
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              "description": "CWE-1321: Improperly Controlled Modification of Object Prototype Attributes (\u0027Prototype Pollution\u0027)",
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        "dateUpdated": "2026-03-06T18:25:22.438Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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      "references": [
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          "tags": [
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          "url": "https://github.com/immutable-js/immutable-js/security/advisories/GHSA-wf6x-7x77-mvgw"
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          "name": "https://github.com/immutable-js/immutable-js/releases/tag/v3.8.3",
          "tags": [
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          "url": "https://github.com/immutable-js/immutable-js/releases/tag/v3.8.3"
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      "source": {
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        "discovery": "UNKNOWN"
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      "title": "Immutable.js: Improperly Controlled Modification of Object Prototype Attributes (\u0027Prototype Pollution\u0027) in immutable"
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    "dateReserved": "2026-03-03T20:51:43.481Z",
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    "state": "PUBLISHED"
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