{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-26021",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-02-09T21:36:29.554Z",
        "datePublished": "2026-02-11T21:18:50.084Z",
        "dateUpdated": "2026-02-12T21:16:04.618Z"
    },
    "containers": {
        "cna": {
            "title": "Prototype pollution in set-in",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-1321",
                            "lang": "en",
                            "description": "CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "LOCAL",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "HIGH",
                        "subConfidentialityImpact": "HIGH",
                        "subIntegrityImpact": "HIGH",
                        "subAvailabilityImpact": "HIGH",
                        "baseScore": 9.4,
                        "baseSeverity": "CRITICAL",
                        "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/ahdinosaur/set-in/security/advisories/GHSA-2c4m-g7rx-63q7",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/ahdinosaur/set-in/security/advisories/GHSA-2c4m-g7rx-63q7"
                },
                {
                    "name": "https://github.com/ahdinosaur/set-in/commit/b8e1dabfdbd35c8d604b6324e01d03f280256c3d",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/ahdinosaur/set-in/commit/b8e1dabfdbd35c8d604b6324e01d03f280256c3d"
                }
            ],
            "affected": [
                {
                    "vendor": "ahdinosaur",
                    "product": "set-in",
                    "versions": [
                        {
                            "version": ">= 2.0.1, < 2.0.5",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-02-11T21:18:50.084Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "set-in provides the set value of nested associative structure given array of keys. A prototype pollution vulnerability exists in the the npm package set-in (>=2.0.1, < 2.0.5). Despite a previous fix that attempted to mitigate prototype pollution by checking whether user input contained a forbidden key, it is still possible to pollute Object.prototype via a crafted input using Array.prototype. This has been fixed in version 2.0.5."
                }
            ],
            "source": {
                "advisory": "GHSA-2c4m-g7rx-63q7",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-02-12T21:15:49.981553Z",
                                "id": "CVE-2026-26021",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-02-12T21:16:04.618Z"
                }
            }
        ]
    }
}