{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-85731",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-09-04T14:45:10.649Z",
        "datePublished": "2026-09-16T16:24:48.905Z",
        "dateUpdated": "2026-09-16T17:25:07.159Z"
    },
    "containers": {
        "cna": {
            "title": "oras-go: Arbitrary file write outside file.Store root via symlink-chain bypass in tar extraction (pushDir)",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-22",
                            "lang": "en",
                            "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-59",
                            "lang": "en",
                            "description": "CWE-59: Improper Link Resolution Before File Access ('Link Following')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "HIGH",
                        "baseScore": 8.8,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "REQUIRED",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/oras-project/oras-go/security/advisories/GHSA-m37j-52j7-pjw7",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/oras-project/oras-go/security/advisories/GHSA-m37j-52j7-pjw7"
                },
                {
                    "name": "https://github.com/oras-project/oras-go/commit/adab2f25ea95ef4e6e41f50db9266a6701399422",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/oras-project/oras-go/commit/adab2f25ea95ef4e6e41f50db9266a6701399422"
                },
                {
                    "name": "https://github.com/oras-project/oras-go/releases/tag/v2.6.2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/oras-project/oras-go/releases/tag/v2.6.2"
                }
            ],
            "affected": [
                {
                    "vendor": "oras-project",
                    "product": "oras-go",
                    "versions": [
                        {
                            "version": "< 2.6.2",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-09-16T16:24:48.905Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "oras-go is a Go library for managing OCI artifacts. Prior to 2.6.2, content/file.Store extraction of OCI layers marked with io.deis.oras.content.unpack=true can write outside the store working directory. The pushDir path through extractTarDirectory and ensureLinkPath validates symlink targets lexically, resolveRelToBase skips its parent-symlink walk for root-level entries, and writeFile follows a terminal symlink when opening a regular file. A malicious archive can therefore create a symlink chain whose lexical target remains inside the extraction root but whose resolved target is an attacker-selected absolute path, then overwrite that target with a same-named regular-file entry even when AllowPathTraversalOnWrite is false. Pulling an attacker-controlled artifact can create or overwrite any file writable by the process and may lead to code execution. This issue is fixed in version 2.6.2."
                }
            ],
            "source": {
                "advisory": "GHSA-m37j-52j7-pjw7",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/oras-project/oras-go/security/advisories/GHSA-m37j-52j7-pjw7",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-16T17:24:00.719255Z",
                                "id": "CVE-2026-85731",
                                "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": "2026-09-16T17:25:07.159Z"
                }
            }
        ]
    }
}