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vuln-cve/data/2026/39xxx/CVE-2026-39822.json
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{
"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"
}
}
]
}
}