{"id":"USN-8779-2","summary":"bubblewrap regression","details":"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)","modified":"2026-09-18T06:00:03.088928043Z","published":"2026-09-17T22:20:14Z","references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8779-2"},{"type":"REPORT","url":"https://bugs.launchpad.net/ubuntu/+source/bubblewrap/+bug/2167621"}],"affected":[{"package":{"name":"bubblewrap","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/bubblewrap?arch=source&distro=esm-infra%2Fbionic"},"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"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"bubblewrap","binary_version":"0.2.1-1ubuntu0.1+esm3"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:18.04:LTS","cves":[]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8779-2.json"}},{"package":{"name":"bubblewrap","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/bubblewrap?arch=source&distro=esm-infra%2Ffocal"},"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"],"ecosystem_specific":{"binaries":[{"binary_version":"0.4.0-1ubuntu4.1+esm3","binary_name":"bubblewrap"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8779-2.json","cves_map":{"ecosystem":"Ubuntu:Pro:20.04:LTS","cves":[]}}},{"package":{"name":"bubblewrap","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/bubblewrap?arch=source&distro=jammy"},"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"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"0.6.1-1ubuntu0.3","binary_name":"bubblewrap"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:22.04:LTS","cves":[]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8779-2.json"}},{"package":{"name":"bubblewrap","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/bubblewrap?arch=source&distro=noble"},"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"],"ecosystem_specific":{"binaries":[{"binary_name":"bubblewrap","binary_version":"0.9.0-1ubuntu0.3"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"cves":[],"ecosystem":"Ubuntu:24.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8779-2.json"}},{"package":{"name":"bubblewrap","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/bubblewrap?arch=source&distro=resolute"},"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"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"bubblewrap","binary_version":"0.11.1-1ubuntu0.3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8779-2.json","cves_map":{"cves":[],"ecosystem":"Ubuntu:26.04:LTS"}}}],"schema_version":"1.9.0"}