{"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":"2026-10-12","sourceUpdated":"2026-10-12T17:17:38.987","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-96275","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:80497","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:80498","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:80687","label":"secalert@redhat.com"},{"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"},{"url":"https://access.redhat.com/errata/RHSA-2026:89733","label":"RHSA-2026:89733"},{"url":"https://access.redhat.com/errata/RHSA-2026:90364","label":"RHSA-2026:90364"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00485,"epssPercentile":0.41579,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-25T18:09:09.886853Z"},"ingestedAt":"2026-09-23T15:26:23.424Z","patched":["enterprise_linux_appstream_v_10","enterprise_linux_appstream_v_8","enterprise_linux_appstream_eus_v_9_6","enterprise_linux_appstream_v_9","enterprise_linux_codeready_linux_builder_v_10","enterprise_linux_crb_v_8","codeready_linux_builder_eus_v_9_6","enterprise_linux_codeready_linux_builder_v_9"],"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 7 · no fix planned: Red Hat Enterprise Linux 7 · updated 2026-10-26 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-96275.json)\n- **RHSA-2026:80498** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-10-12 · [advisory](https://access.redhat.com/errata/RHSA-2026:80498)\n- **RHSA-2026:80687** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-10-12 · [advisory](https://access.redhat.com/errata/RHSA-2026:80687)\n- **RHSA-2026:89733** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat CodeReady Linux Builder EUS (v.9.6) · released 2026-10-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:89733)\n- **RHSA-2026:80497** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) · released 2026-10-12 · [advisory](https://access.redhat.com/errata/RHSA-2026:80497)","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}