{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-112911",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-10-19T20:16:09.858Z",
        "datePublished": "2026-10-20T14:21:24.480Z",
        "dateUpdated": "2026-10-28T15:09:43.507Z"
    },
    "containers": {
        "cna": {
            "title": "filelock: StrictSoftFileLock and SoftReadWriteLock adopt a protocol directory another user created first, losing mutual exclusion",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-283",
                            "lang": "en",
                            "description": "CWE-283: Unverified Ownership",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "LOCAL",
                        "availabilityImpact": "HIGH",
                        "baseScore": 6.3,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "LOW",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/tox-dev/filelock/security/advisories/GHSA-9c4x-gm8v-wgc4",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/tox-dev/filelock/security/advisories/GHSA-9c4x-gm8v-wgc4"
                },
                {
                    "name": "https://github.com/tox-dev/filelock/pull/839",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/tox-dev/filelock/pull/839"
                },
                {
                    "name": "https://github.com/tox-dev/filelock/commit/bfa066d65a1ba9106f86ee9d027f7588b9c77e03",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/tox-dev/filelock/commit/bfa066d65a1ba9106f86ee9d027f7588b9c77e03"
                },
                {
                    "name": "https://github.com/tox-dev/filelock/releases/tag/4.2.1",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/tox-dev/filelock/releases/tag/4.2.1"
                }
            ],
            "affected": [
                {
                    "vendor": "tox-dev",
                    "product": "filelock",
                    "versions": [
                        {
                            "version": ">= 3.30.0, < 4.2.1",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-10-20T14:21:24.480Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "filelock is a platform-independent file lock for Python. From 3.30.0 until 4.2.1, StrictSoftFileLock versions from 3.30.0 and SoftReadWriteLock versions from 4.0.0 can adopt a protocol directory created first by another local user in a shared parent directory, allowing that user to alter protocol state and admit concurrent holders. This issue is fixed in version 4.2.1."
                }
            ],
            "source": {
                "advisory": "GHSA-9c4x-gm8v-wgc4",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/tox-dev/filelock/security/advisories/GHSA-9c4x-gm8v-wgc4",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-10-28T15:09:37.663560Z",
                                "id": "CVE-2026-112911",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-10-28T15:09:43.507Z"
                }
            }
        ]
    }
}