{"affected":[{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"flatpak-builder","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-builder","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-builder","product":"Red Hat Enterprise Linux 9","source":"CNA: redhat","vendor":"Red Hat","versions":[]}],"cveId":"CVE-2026-107466","cwes":["CWE-22"],"description":"A flaw was found in flatpak-builder. This vulnerability allows an attacker to cause information disclosure by convincing a user or continuous integration (CI) system to process a crafted build manifest. By specifying local file Uniform Resource Identifiers (URIs) within source download definitions, the builder bypasses directory confinement checks. As a result, sensitive host files accessible to the build process can be read and incorporated into the build artifacts.","epss":{"date":"2026-11-05","percentile":0.08891,"score":0.00191},"exploits":[],"kev":null,"metrics":[{"score":6.1,"severity":"medium","source":"CNA: redhat","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N","version":"3.1"},{"score":6.1,"severity":"medium","source":"NVD: secalert@redhat.com","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N","version":"3.1"}],"modifiedAt":1793895451430,"publishedAt":1791446043370,"references":[{"source":"CNA: redhat","tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-107466"},{"source":"CNA: redhat","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2471600"},{"source":"secalert@redhat.com","tags":[],"url":"https://access.redhat.com/security/cve/CVE-2026-107466"},{"source":"secalert@redhat.com","tags":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2471600"}],"remediation":[{"kind":"workaround","source":"CNA: redhat","text":"If Flatpak packaging is not required on the system, remove the flatpak-builder package to eliminate exposure:\n\n# dnf remove flatpak-builder\n\nFor development environments and continuous integration pipelines where flatpak-builder is necessary, apply the following operational controls:\n1. Avoid processing build manifests from untrusted or unverified third-party sources.\n2. Execute builds within isolated, ephemeral container or virtual machine environments where sensitive host files and credentials are not mounted or accessible.\n3. Implement pre-build pipeline checks to reject manifests containing `file://` URI schemes in `type: file` or `type: archive` source definitions."}],"revision":"5450cb43c15e65304150f72a28c52f901434ccc38d6e931eae5e520b64f77c4c","sources":[{"modifiedAt":1793894122957,"name":"CNA: redhat","retrievedAt":1793895264779,"url":"https://www.cve.org/CVERecord?id=CVE-2026-107466"},{"modifiedAt":1793895451430,"name":"NVD","retrievedAt":1793902862322,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-107466"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793895282072,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-107466"}],"ssvc":{"assessedAt":1791473165988,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Flatpak-builder: local file exfiltration via `file","updatedAt":1793902862322}