CVE-2026-87766
Full vulnerability record from the local CVENow database.
Description
A flaw was found in bubblewrap. During sandbox setup, creating files or directories under the new root can follow a parent symlink onto the host via /oldroot, writing attacker-chosen paths outside the sandbox as the launching user. This happens before the sandboxed process starts. This issue is GHSA-pxhw-h44j-8pfx. It is fixed in bubblewrap 0.12.0.
Severity
HIGH
CVSS score
8.8
(v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
Published
2026-09-09 09:17:12.540000
Last modified
2026-10-20 00:19:01.237000
View original CVE JSON
{
"id": "CVE-2026-87766",
"sourceIdentifier": "[email protected]",
"published": "2026-09-09T09:17:12.540",
"lastModified": "2026-10-20T00:19:01.237",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in bubblewrap. During sandbox setup, creating files or directories under the new root can follow a parent symlink onto the host via /oldroot, writing attacker-chosen paths outside the sandbox as the launching user. This happens before the sandboxed process starts. This issue is GHSA-pxhw-h44j-8pfx. It is fixed in bubblewrap 0.12.0."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 10",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "bubblewrap",
"cpes": [
"cpe:/o:redhat:enterprise_linux:10.2"
],
"versions": [
{
"version": "0:0.10.0-5.el10_2",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 10.0 Extended Update Support",
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"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "bubblewrap",
"cpes": [
"cpe:/o:redhat:enterprise_linux_eus:10.0"
],
"versions": [
{
"version": "0:0.10.0-3.el10_0.4",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
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"packageName": "bubblewrap",
"cpes": [
"cpe:/o:redhat:enterprise_linux:8::baseos"
],
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{
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"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "bubblewrap",
"cpes": [
"cpe:/o:redhat:rhel_aus:8.4::baseos",
"cpe:/o:redhat:rhel_eus_long_life:8.4::baseos"
],
"versions": [
{
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}
]
},
{
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"packageName": "bubblewrap",
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"cpe:/o:redhat:rhel_eus_long_life:8.4::baseos"
],
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{
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"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "bubblewrap",
"cpes": [
"cpe:/o:redhat:rhel_aus:8.6::baseos",
"cpe:/o:redhat:rhel_eus_long_life:8.6::baseos"
],
"versions": [
{
"version": "0:0.4.0-3.el8_6",
"lessThan": "*",
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"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On",
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"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "bubblewrap",
"cpes": [
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"cpe:/o:redhat:rhel_eus_long_life:8.6::baseos"
],
"versions": [
{
"version": "0:0.4.0-3.el8_6",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8.8 Telecommunications Update Service",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "bubblewrap",
"cpes": [
"cpe:/o:redhat:rhel_e4s:8.8::baseos",
"cpe:/o:redhat:rhel_tus:8.8::baseos"
],
"versions": [
{
"version": "0:0.4.0-3.el8_8",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions",
"defaultStatus": "affected",
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"packageName": "bubblewrap",
"cpes": [
"cpe:/o:redhat:rhel_e4s:8.8::baseos",
"cpe:/o:redhat:rhel_tus:8.8::baseos"
],
"versions": [
{
"version": "0:0.4.0-3.el8_8",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "bubblewrap",
"cpes": [
"cpe:/o:redhat:enterprise_linux:9::baseos"
],
"versions": [
{
"version": "0:0.6.3-1.el9_8.1",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions",
"defaultStatus": "affected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "bubblewrap",
"cpes": [
"cpe:/o:redhat:rhel_e4s:9.2::baseos"
],
"versions": [
{
"version": "0:0.4.1-7.el9_2.1",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions",
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"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "bubblewrap",
"cpes": [
"cpe:/o:redhat:rhel_e4s:9.4::baseos"
],
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{
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}
]
},
{
"vendor": "Red Hat",
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"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "bubblewrap",
"cpes": [
"cpe:/o:redhat:rhel_eus:9.6::baseos"
],
"versions": [
{
"version": "0:0.4.1-8.el9_6.1",
"lessThan": "*",
"versionType": "rpm",
"status": "unaffected"
}
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Hardened Images",
"defaultStatus": "unaffected",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "bubblewrap",
"cpes": [
"cpe:/a:redhat:hummingbird:1"
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "CHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 2.0,
"impactScore": 6.0
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-09-09T14:03:32.467147Z",
"id": "CVE-2026-87766",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-59"
}
]
}
],
"references": [
{
"url": "https://access.redhat.com/errata/RHSA-2026:85306",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:85308",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:85309",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:85312",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:85313",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:85317",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:85319",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:85322",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:85324",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:85325",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/security/cve/CVE-2026-87766",
"source": "[email protected]"
},
{
"url": "https://bugs.debian.org/1145655",
"source": "[email protected]"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2530542",
"source": "[email protected]"
},
{
"url": "https://github.com/containers/bubblewrap/releases/tag/v0.12.0",
"source": "[email protected]"
},
{
"url": "https://github.com/containers/bubblewrap/security/advisories/GHSA-pxhw-h44j-8pfx",
"source": "[email protected]"
},
{
"url": "https://www.openwall.com/lists/oss-security/2026/08/27/7",
"source": "[email protected]"
},
{
"url": "http://www.openwall.com/lists/oss-security/2026/09/09/3",
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.openwall.com/lists/oss-security/2026/09/22/23",
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
]
}