{"id":"CVE-2026-96276","aliases":[],"cve":{"records":[{"id":"CVE-2026-96276","source":"redhat","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-09-22T20:42:35.875Z","published":"2026-09-23T15:01:49.657Z","modified":"2026-11-06T02:14:12.106Z"}],"publishers":[{"name":"redhat","role":"CNA","organizationId":"53f830b8-0a3f-465b-8143-3b8a9948e749","modified":"2026-11-06T02:14:12.106Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-09-23T15:28:23.421Z"}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-96276","tags":["vdb-entry","x_refsource_REDHAT"],"source":"redhat"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2539418","tags":["issue-tracking","x_refsource_REDHAT"],"source":"redhat"},{"url":"https://github.com/flatpak/flatpak/security/advisories/GHSA-8qxj-x646-phcm","tags":[],"source":"redhat"}],"weaknesses":[{"id":"CWE-22","description":"Improper Limitation of a Pathname to a Restricted Directory","source":"redhat"}],"applicability":[],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-09-23T15:28:10.393280Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"yes"},{"name":"Technical Impact","value":"total"}]}]},"title":"Flatpak: flatpak: arbitrary write in host context via flatpak build-init","titleSource":"redhat","descriptionSource":"redhat","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.","score":9.8,"severity":"critical","published":"2026-09-23T15:01:49.657Z","modified":"2026-11-06T02:14:12.106Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 10","platforms":[],"versions":[],"defaultStatus":"affected","cpes":["cpe:/a:redhat:enterprise_linux:10"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-96276"},{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 7","platforms":[],"versions":[],"defaultStatus":"affected","cpes":["cpe:/o:redhat:rhel_els:7"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-96276"},{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 8","platforms":[],"versions":[],"defaultStatus":"affected","cpes":["cpe:/a:redhat:enterprise_linux:8"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-96276"},{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 9","platforms":[],"versions":[],"defaultStatus":"affected","cpes":["cpe:/a:redhat:enterprise_linux:9"],"source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-96276"}],"remediation":[{"text":"Avoid using an non-trusted SDK for development/compilation.","source":"redhat","url":"https://www.cve.org/CVERecord?id=CVE-2026-96276"}],"references":["https://access.redhat.com/security/cve/CVE-2026-96276","https://bugzilla.redhat.com/show_bug.cgi?id=2539418","https://github.com/flatpak/flatpak/security/advisories/GHSA-8qxj-x646-phcm"],"sources":[{"name":"CVE","id":"CVE-2026-96276","modified":"2026-11-06T02:14:12.106Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-96276"}],"assessments":[{"source":"redhat","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","score":6.5},{"source":"CISA-ADP","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8}],"sourceAffected":[],"observedAt":"2026-11-06T03:17:04.237Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T02:25:31.038Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-06T03:25:31.639Z","attemptedAt":"2026-11-06T03:25:31.639Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-11-06T03:25:31.639Z","attemptedAt":"2026-11-06T03:25:31.639Z"},{"source":"EUVD","status":"available","checkedAt":"2026-11-06T03:25:31.639Z","attemptedAt":"2026-11-06T03:25:31.639Z"},{"source":"EPSS","status":"available","checkedAt":"2026-11-06T03:25:31.639Z","attemptedAt":"2026-11-06T03:25:31.639Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-96276","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-96276","modified":"2026-11-06T03:16:47.930","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","checkedAt":"2026-11-06T03:25:31.639Z"},{"source":"NVD","id":"CVE-2026-96276","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-96276","modified":"2026-11-06T03:16:47.930","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","checkedAt":"2026-11-06T03:25:31.639Z"},{"source":"FIRST EPSS","id":"CVE-2026-96276","url":"https://www.first.org/epss/","probability":0.00436,"percentile":0.3806,"date":"2026-11-05","checkedAt":"2026-11-06T03:25:31.639Z"},{"source":"ENISA EUVD","id":"EUVD-2026-85343","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-85343","modified":"Nov 6, 2026, 2:14:12 AM","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","checkedAt":"2026-11-06T03:25:31.639Z"}],"aiSummary":{"text":"Flatpak has an arbitrary write vulnerability in the host context via flatpak build-init, allowing attacker-chosen files to be written outside the working directory. This occurs when a malicious SDK container declares a crafted extension point and a developer runs flatpak build-init with that SDK. The vulnerability is due to improper limitation of a pathname to a restricted directory.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-06T03:21:08.329Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-96276"}]}}