{"affected":[{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"flatpak","product":"Red Hat Enterprise Linux 10","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"flatpak","product":"Red Hat Enterprise Linux 7","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"flatpak","product":"Red Hat Enterprise Linux 8","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"flatpak","product":"Red Hat Enterprise Linux 9","source":"CNA: redhat","vendor":"Red Hat","versions":[]}],"cveId":"CVE-2026-96276","cwes":["CWE-22"],"description":"If a malicious SDK container declares an extension point with a crafted `directory` path, and a developer runs `flatpak build-init --writable-sdk --sdk-extension` with that SDK, attacker-chosen files could be written outside the working directory, since the target path is resolved via a function that allows `..` traversal.","epss":{"date":"2026-11-05","percentile":0.3806,"score":0.00436},"exploits":[],"kev":null,"metrics":[{"score":6.5,"severity":"medium","source":"CNA: redhat","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","version":"3.1"},{"score":9.8,"severity":"critical","source":"ADP: CISA-ADP","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1793931252106,"publishedAt":1790175709657,"references":[{"source":"CNA: redhat","tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-96276"},{"source":"CNA: redhat","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2539418"},{"source":"CNA: redhat","tags":[],"url":"https://github.com/flatpak/flatpak/security/advisories/GHSA-8qxj-x646-phcm"}],"remediation":[{"kind":"workaround","source":"CNA: redhat","text":"Avoid using an non-trusted SDK for development/compilation."}],"revision":"673f44e4f9e65b1492dc3d88ddf9dc101fed6dc6041e4ae866b436de94fbbb2a","sources":[{"modifiedAt":1793931252106,"name":"CNA: redhat","retrievedAt":1793934537582,"url":"https://www.cve.org/CVERecord?id=CVE-2026-96276"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793934556740,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-96276"}],"ssvc":{"assessedAt":1790177290393,"automatable":"yes","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"total"},"status":"published","title":"Flatpak: flatpak: arbitrary write in host context via flatpak build-init","updatedAt":1793934556740}