{"id":"CVE-2026-96275","title":"A malicious or compromised Flatpak repository can write attacker-controlled content to arbitrary locations on the host filesystem via extract_extra_data()","summary":"A malicious or compromised Flatpak repository can write attacker-controlled content to arbitrary locations on the host filesystem via extract_extra_data(). On system installs, the write happens as root. Two issues combine: `files/extra` …","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-22"],"vendor":"Red Hat","product":"flatpak","affected":["flatpak (all versions)","flatpak (all versions)","flatpak (all versions)","flatpak (all versions)"],"published":"2026-09-23","updated":"2026-09-25","sourceUpdated":"2026-09-25T18:17:34.003","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-96275","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-96275","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2539416","label":"secalert@redhat.com"},{"url":"https://github.com/flatpak/flatpak/security/advisories/GHSA-fqx6-vh4p-42cg","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-96275.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-96275"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-96275"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-25T18:09:09.886853Z"},"epss":0.00361,"epssPercentile":0.27095,"ingestedAt":"2026-09-23T15:26:23.424Z","slug":"CVE-2026-96275","body":"## Overview\n\nA malicious or compromised Flatpak repository can write attacker-controlled content to arbitrary locations on the host filesystem via extract_extra_data(). On system installs, the write happens as root. Two issues combine: `files/extra` is resolved via path operations that follow symlinks, and blob names from `xa.extra-data-sources` are not sanitized against `..` traversal.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-09-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-96275.json)","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}