Ubuntu Security Notices USN-8288-1 USN-8288-1: Bubblewrap vulnerability Publication date 20 May 2026 Overview Bubblewrap could be made to bypass sandbox restrictions. Releases 26.04 LTS 25.10 Open side navigation Close side navigation Packages Details Update instructions References Packages bubblewrap - Low-level unprivileged sandboxing tool used by Flatpak and similar projects Details It was discovered that Bubblewrap incorrectly handled the sandbox setup phase when installed in setuid mode. A local attacker could possibly use this issue to bypass sandbox restrictions. It was discovered that Bubblewrap incorrectly handled the sandbox setup phase when installed in setuid mode. A local attacker could possibly use this issue to bypass sandbox restrictions. Update instructions In general, a standard system update will make all the necessary changes. Learn more about how to get the fixes. The problem can be corrected by updating your system to the following package versions: Ubuntu Release Package Version 26.04 LTS resolute bubblewrap – 0.11.1-1ubuntu0.1 25.10 questing bubblewrap – 0.11.0-2ubuntu0.1 Reduce your security exposure Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines. Get Ubuntu Pro References CVE-2026-41163 CVE-2026-41163