{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-104848",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-10-02T14:38:43.244Z",
        "datePublished": "2026-10-02T16:15:04.101Z",
        "dateUpdated": "2026-10-02T17:29:40.500Z"
    },
    "containers": {
        "cna": {
            "title": "Tinypool: Prototype Pollution gadget in worker options leads to Remote Code Execution",
            "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": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "HIGH",
                        "subConfidentialityImpact": "HIGH",
                        "subIntegrityImpact": "HIGH",
                        "subAvailabilityImpact": "HIGH",
                        "baseScore": 9.5,
                        "baseSeverity": "CRITICAL",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/tinylibs/tinypool/security/advisories/GHSA-5gmw-xhrv-c9v3",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/tinylibs/tinypool/security/advisories/GHSA-5gmw-xhrv-c9v3"
                },
                {
                    "name": "https://github.com/tinylibs/tinypool/pull/134",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/tinylibs/tinypool/pull/134"
                },
                {
                    "name": "https://github.com/tinylibs/tinypool/commit/24df4e730e7d0857a6d226c9b58f8924227404fd",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/tinylibs/tinypool/commit/24df4e730e7d0857a6d226c9b58f8924227404fd"
                },
                {
                    "name": "https://github.com/tinylibs/tinypool/releases/tag/v2.1.1",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/tinylibs/tinypool/releases/tag/v2.1.1"
                }
            ],
            "affected": [
                {
                    "vendor": "tinylibs",
                    "product": "tinypool",
                    "versions": [
                        {
                            "version": "< 2.1.1",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-10-02T16:15:04.101Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Tinypool is a minimal Node.js worker thread pool implementation. Prior to 2.1.1, Tinypool constructs ThreadPool.options from a normal options object and reads the execArgv and env worker options in dist/index.js, allowing values inherited from a polluted Object.prototype to be copied into own properties and passed to worker_threads.Worker. An attacker who can first pollute either property can cause each newly spawned worker to load attacker-selected JavaScript through command-line preload arguments or NODE_OPTIONS, resulting in code execution with the host process's privileges and possible access to CI secrets, signing material, or build artifacts. This issue is fixed in version 2.1.1."
                }
            ],
            "source": {
                "advisory": "GHSA-5gmw-xhrv-c9v3",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/tinylibs/tinypool/security/advisories/GHSA-5gmw-xhrv-c9v3",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-10-02T17:29:00.481503Z",
                                "id": "CVE-2026-104848",
                                "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": "2026-10-02T17:29:40.500Z"
                }
            }
        ]
    }
}