rootpwn

critical · CVSS v3 9.8

CVE-2026-96276

If a malicious SDK container declares an extension point with a crafted `directory` path, and a developer runs `flatpak …

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.

Scores

Severity
critical
CVSS v2
7.5
CVSS v3
9.8
CVSS v4
EPSS

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