{"id":"CVE-2026-87766","title":"A flaw was found in bubblewrap","summary":"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 …","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cwe":["CWE-59"],"vendor":"Red Hat","product":"bubblewrap","affected":["bubblewrap (all versions)","bubblewrap (all versions)","bubblewrap (all versions)","bubblewrap"],"published":"2026-09-09","updated":"2026-09-22","sourceUpdated":"2026-09-22T23:17:07.763","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-87766","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-87766","label":"secalert@redhat.com"},{"url":"https://bugs.debian.org/1145655","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2530542","label":"secalert@redhat.com"},{"url":"https://github.com/containers/bubblewrap/releases/tag/v0.12.0","label":"secalert@redhat.com"},{"url":"https://github.com/containers/bubblewrap/security/advisories/GHSA-pxhw-h44j-8pfx","label":"secalert@redhat.com"},{"url":"https://www.openwall.com/lists/oss-security/2026/08/27/7","label":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2026/09/09/3","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2026/09/22/23","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-09T14:03:32.467147Z"},"epss":0.0014,"epssPercentile":0.03692,"ingestedAt":"2026-09-10T14:24:43.442Z","slug":"CVE-2026-87766","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}