CVE-2026-34078

A flaw was found in Flatpak, a Linux application sandboxing and distribution framework. A malicious application could exploit this by using specially crafted symlinks within the sandbox-expose options of the Flatpak portal. This allows the application to access arbitrary host files and potentially achieve code execution on the host system, bypassing the intended security sandbox.

This Important flaw in Flatpak allows a malicious Flatpak application to escape its sandbox and achieve arbitrary code execution on the host system. By exploiting specially crafted symlinks within the sandbox-expose options, the integrity of the Flatpak sandboxing mechanism, a critical security feature in Red Hat environments, is compromised.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.