CVE-2026-96276 — Flatpak: flatpak: arbitrary write in host context via flatpak build-init
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,…
Published: 2026-09-23 · CVSS: 6.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7