CVE-2026-29063 (GCVE-0-2026-29063)

Vulnerability from cvelistv5 – Published: 2026-03-06 18:25 – Updated: 2026-03-06 19:33
VLAI?
Title
Immutable.js: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in immutable
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.
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')
Assigner
References
Impacted products
Vendor Product Version
immutable-js immutable-js Affected: < 3.8.3
Affected: < 4.3.7
Affected: < 5.1.5
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-29063",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-06T19:32:37.694711Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-06T19:33:31.642Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "immutable-js",
          "vendor": "immutable-js",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.8.3"
            },
            {
              "status": "affected",
              "version": "\u003c 4.3.7"
            },
            {
              "status": "affected",
              "version": "\u003c 5.1.5"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1321",
              "description": "CWE-1321: Improperly Controlled Modification of Object Prototype Attributes (\u0027Prototype Pollution\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-06T18:25:22.438Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/immutable-js/immutable-js/security/advisories/GHSA-wf6x-7x77-mvgw",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/immutable-js/immutable-js/security/advisories/GHSA-wf6x-7x77-mvgw"
        },
        {
          "name": "https://github.com/immutable-js/immutable-js/releases/tag/v3.8.3",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/immutable-js/immutable-js/releases/tag/v3.8.3"
        },
        {
          "name": "https://github.com/immutable-js/immutable-js/releases/tag/v4.3.8",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/immutable-js/immutable-js/releases/tag/v4.3.8"
        },
        {
          "name": "https://github.com/immutable-js/immutable-js/releases/tag/v5.1.5",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/immutable-js/immutable-js/releases/tag/v5.1.5"
        }
      ],
      "source": {
        "advisory": "GHSA-wf6x-7x77-mvgw",
        "discovery": "UNKNOWN"
      },
      "title": "Immutable.js: Improperly Controlled Modification of Object Prototype Attributes (\u0027Prototype Pollution\u0027) in immutable"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-29063",
    "datePublished": "2026-03-06T18:25:22.438Z",
    "dateReserved": "2026-03-03T20:51:43.481Z",
    "dateUpdated": "2026-03-06T19:33:31.642Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-29063",
      "date": "2026-05-19",
      "epss": "0.00214",
      "percentile": "0.43798"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-29063\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-03-06T19:16:21.557\",\"lastModified\":\"2026-04-17T21:32:18.947\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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.\"},{\"lang\":\"es\",\"value\":\"Immutable.js proporciona muchas estructuras de datos inmutables persistentes. Antes de las versiones 3.8.3, 4.3.7 y 5.1.5, la contaminaci\u00f3n de prototipos es posible en immutable a trav\u00e9s de las APIs mergeDeep(), mergeDeepWith(), merge(), Map.toJS() y Map.toObject(). Este problema ha sido parcheado en las versiones 3.8.3, 4.3.7 y 5.1.5.\"}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X\",\"baseScore\":8.7,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"HIGH\",\"vulnIntegrityImpact\":\"NONE\",\"vulnAvailabilityImpact\":\"NONE\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":9.8,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-1321\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:immutable-js:immutable:*:*:*:*:*:node.js:*:*\",\"versionStartIncluding\":\"3.0.0\",\"versionEndExcluding\":\"3.8.3\",\"matchCriteriaId\":\"22FDF10C-08DC-4178-9F7C-D580C292885A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:immutable-js:immutable:*:*:*:*:*:node.js:*:*\",\"versionStartIncluding\":\"4.0.0\",\"versionEndExcluding\":\"4.3.7\",\"matchCriteriaId\":\"A0F2EC71-7029-4F13-B383-6018587EE882\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:immutable-js:immutable:*:*:*:*:*:node.js:*:*\",\"versionStartIncluding\":\"5.0.0\",\"versionEndExcluding\":\"5.1.5\",\"matchCriteriaId\":\"17E6FB8C-0F81-4EA4-B197-C08AB22253C3\"}]}]}],\"references\":[{\"url\":\"https://github.com/immutable-js/immutable-js/releases/tag/v3.8.3\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Release Notes\"]},{\"url\":\"https://github.com/immutable-js/immutable-js/releases/tag/v4.3.8\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Release Notes\"]},{\"url\":\"https://github.com/immutable-js/immutable-js/releases/tag/v5.1.5\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Release Notes\"]},{\"url\":\"https://github.com/immutable-js/immutable-js/security/advisories/GHSA-wf6x-7x77-mvgw\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Exploit\",\"Vendor Advisory\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-29063\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-03-06T19:32:37.694711Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-03-06T19:32:46.434Z\"}}], \"cna\": {\"title\": \"Immutable.js: Improperly Controlled Modification of Object Prototype Attributes (\u0027Prototype Pollution\u0027) in immutable\", \"source\": {\"advisory\": \"GHSA-wf6x-7x77-mvgw\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 8.7, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"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\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"HIGH\"}}], \"affected\": [{\"vendor\": \"immutable-js\", \"product\": \"immutable-js\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 3.8.3\"}, {\"status\": \"affected\", \"version\": \"\u003c 4.3.7\"}, {\"status\": \"affected\", \"version\": \"\u003c 5.1.5\"}]}], \"references\": [{\"url\": \"https://github.com/immutable-js/immutable-js/security/advisories/GHSA-wf6x-7x77-mvgw\", \"name\": \"https://github.com/immutable-js/immutable-js/security/advisories/GHSA-wf6x-7x77-mvgw\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/immutable-js/immutable-js/releases/tag/v3.8.3\", \"name\": \"https://github.com/immutable-js/immutable-js/releases/tag/v3.8.3\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/immutable-js/immutable-js/releases/tag/v4.3.8\", \"name\": \"https://github.com/immutable-js/immutable-js/releases/tag/v4.3.8\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/immutable-js/immutable-js/releases/tag/v5.1.5\", \"name\": \"https://github.com/immutable-js/immutable-js/releases/tag/v5.1.5\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-1321\", \"description\": \"CWE-1321: Improperly Controlled Modification of Object Prototype Attributes (\u0027Prototype Pollution\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-03-06T18:25:22.438Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-29063\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-06T19:33:31.642Z\", \"dateReserved\": \"2026-03-03T20:51:43.481Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-03-06T18:25:22.438Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.