{"id":"ALSA-2026:85306","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\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.\n","modified":"2026-10-20T16:00:04.441428716Z","published":"2026-10-19T00:00:00Z","related":["CVE-2026-87766"],"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:85306"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-87766"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2530542"},{"type":"ADVISORY","url":"https://errata.almalinux.org/8/ALSA-2026-85306.html"}],"affected":[{"package":{"name":"bubblewrap","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/bubblewrap"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.0-3.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:85306.json"}}],"schema_version":"1.9.0"}