{"id":"RLSA-2026:85309","summary":"Important: bubblewrap security update","details":"Bubblewrap (/usr/bin/bwrap) is a core execution engine for unprivileged containers that works as a setuid binary on kernels without user namespaces.\n\nSecurity Fix(es):\n\n* bubblewrap: symlink traversal via /oldroot allows writing files outside sandbox during setup (CVE-2026-87766)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","modified":"2026-10-21T07:15:06.085459490Z","published":"2026-10-21T06:40:55.719656Z","upstream":["CVE-2026-87766"],"database_specific":{"source_advisory":"RHSA-2026:85309","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/"},"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2026:85309"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2530542"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:85309"}],"affected":[{"package":{"name":"bubblewrap","ecosystem":"Rocky Linux:9","purl":"pkg:rpm/rocky-linux/bubblewrap?distro=rocky-linux-9&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:0.6.3-1.el9_8.1"}],"database_specific":{"yum_repository":"BaseOS"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:85309.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}