{"schema_version": "1.7.0", "id": "RLSA-2026:85306", "modified": "2026-10-21T06:48:00.455065Z", "published": "2026-10-21T06:37:12.817086Z", "upstream": ["CVE-2026-87766"], "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.", "severity": [{"type": "CVSS_V3", "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"}], "affected": [{"package": {"ecosystem": "Rocky Linux:8", "name": "bubblewrap", "purl": "pkg:rpm/rocky-linux/bubblewrap?distro=rocky-linux-8&epoch=0"}, "ranges": [{"type": "ECOSYSTEM", "events": [{"introduced": "0"}, {"fixed": "0:0.4.0-3.el8_10"}], "database_specific": {"yum_repository": "BaseOS"}}]}], "references": [{"type": "ADVISORY", "url": "https://errata.rockylinux.org/RLSA-2026:85306"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2530542"}, {"type": "ADVISORY", "url": "https://access.redhat.com/errata/RHSA-2026:85306"}], "credits": [{"name": "Rocky Enterprise Software Foundation"}, {"name": "Red Hat"}], "database_specific": {"license": "CC-BY-4.0", "license_url": "https://creativecommons.org/licenses/by/4.0/", "source_advisory": "RHSA-2026:85306"}}