{"id":"CVE-2026-96279","title":"A malicious OCI registry can hardlink arbitrary host files into the extraction directory when a user installs or updates a Flatpak application from an OCI remote, allowing disclosure of arbitrary host file contents","summary":"A malicious OCI registry can hardlink arbitrary host files into the extraction directory when a user installs or updates a Flatpak application from an OCI remote, allowing disclosure of arbitrary host file contents. For system-wide insta…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","cwe":["CWE-59"],"vendor":"Red Hat","product":"flatpak","affected":["flatpak (all versions)","flatpak","flatpak","flatpak"],"published":"2026-09-27","updated":"2026-09-27","sourceUpdated":"2026-09-27T21:17:04.100","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-96279","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-96279","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2539417","label":"secalert@redhat.com"},{"url":"https://github.com/flatpak/flatpak/security/advisories/GHSA-9rww-v4mm-x4jg","label":"secalert@redhat.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-27T19:57:22.599Z","slug":"CVE-2026-96279","body":"## Overview\n\nA malicious OCI registry can hardlink arbitrary host files into the extraction directory when a user installs or updates a Flatpak application from an OCI remote, allowing disclosure of arbitrary host file contents. For system-wide installs running as root, this includes sensitive files such as /etc/shadow.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":211685,"id":"CVE-2026-96279","ts":1790542715251,"field":"cvss","old":null,"new":"6.5"},{"seq":211684,"id":"CVE-2026-96279","ts":1790542715251,"field":"severity","old":"none","new":"medium"}]}