{"id":"USN-8779-2","aliases":[],"status":"published","title":"bubblewrap regression","description":"USN-8779-1 fixed vulnerabilities in Bubblewrap. Unfortunately, the fix for\nCVE-2026-87766 introduced a regression in symlink resolution, preventing\ncertain Flatpak applications from launching. This update reverts that fix\nuntil a complete fix is available.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n It was discovered that Bubblewrap incorrectly handled certain temporary\n directories. A local attacker could possibly use this issue to cause a\n denial of service or execute arbitrary code. This issue only affected\n Ubuntu 18.04 LTS. (CVE-2019-12439)\n\n It was discovered that Bubblewrap incorrectly handled certain symlinks\n during sandbox setup. A local attacker could possibly use this issue to\n create files outside of the sandbox. (CVE-2026-87766)","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2026-09-17T22:20:14Z","modified":"2026-09-18T06:00:03Z","fixes":[{"ecosystem":"Ubuntu:Pro:18.04:LTS","package":"bubblewrap","fixed_in":["0.2.1-1ubuntu0.1+esm3"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:20.04:LTS","package":"bubblewrap","fixed_in":["0.4.0-1ubuntu4.1+esm3"],"sources":["osv"]},{"ecosystem":"Ubuntu:22.04:LTS","package":"bubblewrap","fixed_in":["0.6.1-1ubuntu0.3"],"sources":["osv"]},{"ecosystem":"Ubuntu:24.04:LTS","package":"bubblewrap","fixed_in":["0.9.0-1ubuntu0.3"],"sources":["osv"]},{"ecosystem":"Ubuntu:26.04:LTS","package":"bubblewrap","fixed_in":["0.11.1-1ubuntu0.3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"bubblewrap","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.2.1-1ubuntu0.1+esm3"}]}],"versions":["0.2.0-1","0.2.0-2","0.2.0-4","0.2.1-1","0.2.1-1ubuntu0.1","0.2.1-1ubuntu0.1+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"bubblewrap","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.0-1ubuntu4.1+esm3"}]}],"versions":["0.3.3-2","0.4.0-1","0.4.0-1ubuntu1","0.4.0-1ubuntu2","0.4.0-1ubuntu3","0.4.0-1ubuntu4","0.4.0-1ubuntu4.1","0.4.0-1ubuntu4.1+esm2"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"bubblewrap","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.1-1ubuntu0.3"}]}],"versions":["0.4.1-3build1","0.5.0-1","0.6.0-1","0.6.1-1","0.6.1-1ubuntu0.1","0.6.1-1ubuntu0.2"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"bubblewrap","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.0-1ubuntu0.3"}]}],"versions":["0.8.0-2","0.9.0-1build1","0.9.0-1ubuntu0.1","0.9.0-1ubuntu0.2"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"bubblewrap","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.11.1-1ubuntu0.3"}]}],"versions":["0.11.0-2","0.11.0-2build1","0.11.1-1","0.11.1-1ubuntu0.1","0.11.1-1ubuntu0.2"]}],"references":[{"url":"https://ubuntu.com/security/notices/USN-8779-2","tags":["advisory"]},{"url":"https://bugs.launchpad.net/ubuntu/+source/bubblewrap/+bug/2167621","tags":["report"]}],"sources":{"osv":[{"id":"USN-8779-2","title":"bubblewrap regression","description":"USN-8779-1 fixed vulnerabilities in Bubblewrap. Unfortunately, the fix for\nCVE-2026-87766 introduced a regression in symlink resolution, preventing\ncertain Flatpak applications from launching. This update reverts that fix\nuntil a complete fix is available.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n It was discovered that Bubblewrap incorrectly handled certain temporary\n directories. A local attacker could possibly use this issue to cause a\n denial of service or execute arbitrary code. This issue only affected\n Ubuntu 18.04 LTS. (CVE-2019-12439)\n\n It was discovered that Bubblewrap incorrectly handled certain symlinks\n during sandbox setup. A local attacker could possibly use this issue to\n create files outside of the sandbox. (CVE-2026-87766)","status":"published","published":"2026-09-17T22:20:14Z","modified":"2026-09-18T06:00:03.088928043Z","updated_at":"2026-11-02T16:58:26.907654Z"}]}}