{"id":"CVE-2026-96276","published":"2026-09-23T15:17:32.317","lastModified":"2026-09-27T21:17:03.160","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.","cvssScore":6.5,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","cwes":["CWE-22"],"vendors":[],"products":[],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-96276","tags":[]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2539418","tags":[]},{"url":"https://github.com/flatpak/flatpak/security/advisories/GHSA-8qxj-x646-phcm","tags":[]}],"exploitRefs":[{"url":"https://github.com/flatpak/flatpak/security/advisories/GHSA-8qxj-x646-phcm","tags":[]}],"hasPoc":true,"ai":{"summary":"The flaw allows a malicious SDK container to write attacker-chosen files outside the intended directory, posing a significant risk to system integrity.","exploitability":"Exploitation is moderately hard as it requires a malicious SDK and specific command execution. Developers must run `flatpak build-init` with the `--writable-sdk --sdk-extension` flags.","blast_radius":"If exploited, this could lead to unauthorized data modification or loss, with potential impact on system security and data confidentiality.","remediation":"Disable the `flatpak build-init --writable-sdk --sdk-extension` functionality or restrict access to this feature.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","sdk","file-write"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-27T08:51:03.790Z"}}