{"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":"2026-09-22T23:07:02.744Z"},"containers":{"cna":{"title":"Bubblewrap: bubblewrap: symlink traversal via /oldroot allows writing files outside sandbox during setup","metrics":[{"other":{"content":{"value":"Important","namespace":"https://access.redhat.com/security/updates/classification/"},"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"}],"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":[{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"bubblewrap","defaultStatus":"affected","cpes":["cpe:/o:redhat:enterprise_linux:10"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"bubblewrap","defaultStatus":"affected","cpes":["cpe:/o:redhat:enterprise_linux:8"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"bubblewrap","defaultStatus":"affected","cpes":["cpe:/o:redhat:enterprise_linux:9"]},{"vendor":"Red Hat","product":"Red Hat Hardened Images","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"bubblewrap","defaultStatus":"unaffected","cpes":["cpe:/a:redhat:hummingbird:1"]}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-87766","tags":["vdb-entry","x_refsource_REDHAT"]},{"url":"https://bugs.debian.org/1145655"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2530542","name":"RHBZ#2530542","tags":["issue-tracking","x_refsource_REDHAT"]},{"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"}],"datePublic":"2026-09-09T00:00:00.000Z","problemTypes":[{"descriptions":[{"cweId":"CWE-59","description":"Improper Link Resolution Before File Access ('Link Following')","lang":"en","type":"CWE"}]}],"x_redhatCweChain":"CWE-59: Improper Link Resolution Before File Access ('Link Following')","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."}],"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."}],"credits":[{"lang":"en","value":"Red Hat would like to thank geeknik for reporting this issue."}],"providerMetadata":{"orgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","shortName":"redhat","dateUpdated":"2026-09-09T09:59:58.220Z"},"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-09T14:03:32.467147Z","id":"CVE-2026-87766","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":"2026-09-09T14:03:39.929Z"}},{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/09/09/3"},{"url":"http://www.openwall.com/lists/oss-security/2026/09/22/23"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2026-09-22T23:07:02.744Z"}}]}}