{"id":"RLSA-2026:21756","summary":"Important: flatpak security update","details":"Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux.\n\nSecurity Fix(es):\n\n* flatpak: Flatpak: Arbitrary code execution via crafted symlinks in sandbox-expose options (CVE-2026-34078)\n\n* flatpak: Flatpak: Arbitrary file deletion on host via improper cache file path validation (CVE-2026-34079)\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":"2026-05-29T06:30:05.359041396Z","published":"2026-05-29T06:00:50.714518Z","upstream":["CVE-2026-34078","CVE-2026-34079"],"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2026:21756"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2456276"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2456284"}],"affected":[{"package":{"name":"flatpak","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/flatpak?distro=rocky-linux-8&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:1.12.9-4.el8_10"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:21756.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}