{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-39822",
        "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "state": "PUBLISHED",
        "assignerShortName": "Go",
        "dateReserved": "2026-04-07T18:13:03.527Z",
        "datePublished": "2026-07-08T15:46:27.199Z",
        "dateUpdated": "2026-07-08T19:39:17.341Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
                "shortName": "Go",
                "dateUpdated": "2026-07-08T15:46:27.199Z"
            },
            "title": "Root escape via symlink plus trailing slash in os",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "On Unix systems, opening a file in an os.Root improperly follows symlinks to locations outside of the Root when the final path component of the a path is a symbolic link and the path ends in /. For example, 'root.Open(\"symlink/\")' will open \"symlink\" even when \"symlink\" is a symbolic link pointing outside of the root."
                }
            ],
            "affected": [
                {
                    "vendor": "Go standard library",
                    "product": "os",
                    "collectionURL": "https://pkg.go.dev",
                    "packageName": "os",
                    "versions": [
                        {
                            "version": "0",
                            "lessThan": "1.25.12",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "1.26.0-0",
                            "lessThan": "1.26.5",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "1.27.0-0",
                            "lessThan": "1.27.0-rc.2",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ],
                    "programRoutines": [
                        {
                            "name": "rootOpenFileNolog"
                        },
                        {
                            "name": "openRootInRoot"
                        },
                        {
                            "name": "OpenInRoot"
                        },
                        {
                            "name": "Root.Create"
                        },
                        {
                            "name": "Root.Open"
                        },
                        {
                            "name": "Root.OpenFile"
                        },
                        {
                            "name": "Root.OpenRoot"
                        },
                        {
                            "name": "Root.ReadFile"
                        },
                        {
                            "name": "Root.WriteFile"
                        },
                        {
                            "name": "rootFS.Open"
                        },
                        {
                            "name": "rootFS.ReadDir"
                        },
                        {
                            "name": "rootFS.ReadFile"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "CWE-61: UNIX Symbolic Link (Symlink) Following"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://go.dev/issue/79005"
                },
                {
                    "url": "https://groups.google.com/g/golang-announce/c/OrmQE_Yp5Sc"
                },
                {
                    "url": "https://go.dev/cl/797880"
                },
                {
                    "url": "https://pkg.go.dev/vuln/GO-2026-4970"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Mundur (https://github.com/M0nd0R)"
                }
            ]
        },
        "adp": [
            {
                "problemTypes": [
                    {
                        "descriptions": [
                            {
                                "type": "CWE",
                                "cweId": "CWE-61",
                                "lang": "en",
                                "description": "CWE-61 UNIX Symbolic Link (Symlink) Following"
                            }
                        ]
                    }
                ],
                "metrics": [
                    {
                        "cvssV3_1": {
                            "scope": "UNCHANGED",
                            "version": "3.1",
                            "baseScore": 7.8,
                            "attackVector": "LOCAL",
                            "baseSeverity": "HIGH",
                            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                            "integrityImpact": "HIGH",
                            "userInteraction": "NONE",
                            "attackComplexity": "LOW",
                            "availabilityImpact": "HIGH",
                            "privilegesRequired": "LOW",
                            "confidentialityImpact": "HIGH"
                        }
                    },
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-07-08T18:06:16.360721Z",
                                "id": "CVE-2026-39822",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "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": "2026-07-08T19:39:17.341Z"
                }
            }
        ]
    }
}