{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-87766", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2026-09-09T08:08:33.568Z", "datePublished": "2026-09-09T08:34:35.359Z", "dateUpdated": "2026-09-09T08:54:45.253Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:10"], "defaultStatus": "unknown", "packageName": "bubblewrap", "product": "Red Hat Enterprise Linux 10", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:8"], "defaultStatus": "unknown", "packageName": "bubblewrap", "product": "Red Hat Enterprise Linux 8", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:9"], "defaultStatus": "unknown", "packageName": "bubblewrap", "product": "Red Hat Enterprise Linux 9", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:hummingbird:1"], "defaultStatus": "unknown", "packageName": "bubblewrap", "product": "Red Hat Hardened Images", "vendor": "Red Hat"}], "credits": [{"lang": "en", "value": "Red Hat would like to thank geeknik for reporting this issue."}], "datePublic": "2026-09-09T00:00:00.000Z", "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."}], "metrics": [{"other": {"content": {"namespace": "https://access.redhat.com/security/updates/classification/", "value": "Important"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "format": "CVSS"}], "problemTypes": [{"descriptions": [{"cweId": "CWE-59", "description": "Improper Link Resolution Before File Access ('Link Following')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-09-09T08:54:45.253Z"}, "references": [{"tags": ["vdb-entry", "x_refsource_REDHAT"], "url": "https://access.redhat.com/security/cve/CVE-2026-87766"}, {"url": "https://bugs.debian.org/1145655"}, {"name": "RHBZ#2530542", "tags": ["issue-tracking", "x_refsource_REDHAT"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2530542"}, {"url": "https://github.com/containers/bubblewrap/releases/tag/v0.12.0"}, {"url": "https://github.com/containers/bubblewrap/security/advisories/GHSA-pxhw-h44j-8pfx"}, {"url": "https://www.openwall.com/lists/oss-security/2026/08/27/7"}], "timeline": [{"lang": "en", "time": "2026-09-09T08:00:27.775Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-09-09T00:00:00.000Z", "value": "Made public."}], "title": "Bubblewrap: bubblewrap: symlink traversal via /oldroot allows writing files outside sandbox during setup", "workarounds": [{"lang": "en", "value": "Do not create files on untrusted content with unpatched bwrap. Do not install untrusted Flatpaks. No upstream fix for older setuid builds."}], "x_generator": {"engine": "cvelib 1.8.0"}, "x_redhatCweChain": "CWE-59: Improper Link Resolution Before File Access ('Link Following')"}}}

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