{"id":"USN-8822-1","summary":"libwebsockets vulnerabilities","details":"It was discovered that Libwebsockets incorrectly handled certain SSH\nprotocol messages in its SSH protocol handler. A remote attacker could\npossibly use this issue to cause Libwebsockets to consume excessive\nresources, resulting in a denial of service. (CVE-2026-10650)\n\nIt was discovered that Libwebsockets incorrectly handled certain malformed\nCBOR data. A remote attacker could possibly use this issue to cause\nLibwebsockets to crash, resulting in a denial of service, or execute\narbitrary code. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04\nLTS. (CVE-2026-78161)","modified":"2026-09-28T11:42:19.223904031Z","published":"2026-09-25T02:39:11Z","related":["UBUNTU-CVE-2026-10650","UBUNTU-CVE-2026-78161"],"upstream":["CVE-2026-10650","CVE-2026-78161","UBUNTU-CVE-2026-10650","UBUNTU-CVE-2026-78161"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8822-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-10650"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-78161"}],"affected":[{"package":{"name":"libwebsockets","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/libwebsockets?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.1-3ubuntu0.1~esm2"}]}],"versions":["2.0.3-3build1","3.2.1-3","3.2.1-3ubuntu0.1~esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"libwebsockets-test-server","binary_version":"3.2.1-3ubuntu0.1~esm2"},{"binary_version":"3.2.1-3ubuntu0.1~esm2","binary_name":"libwebsockets-test-server-common"},{"binary_name":"libwebsockets15","binary_version":"3.2.1-3ubuntu0.1~esm2"}]},"database_specific":{"cves_map":{"cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","type":"CVSS_V4"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-10650"}],"ecosystem":"Ubuntu:Pro:20.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8822-1.json"}},{"package":{"name":"libwebsockets","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/libwebsockets?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.0.20-2ubuntu1.1+esm1"}]}],"versions":["4.0.20-2","4.0.20-2ubuntu1","4.0.20-2ubuntu1.1"],"ecosystem_specific":{"binaries":[{"binary_version":"4.0.20-2ubuntu1.1+esm1","binary_name":"libwebsockets-test-server"},{"binary_name":"libwebsockets-test-server-common","binary_version":"4.0.20-2ubuntu1.1+esm1"},{"binary_name":"libwebsockets16","binary_version":"4.0.20-2ubuntu1.1+esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2026-10650","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:Pro:22.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8822-1.json"}},{"package":{"name":"libwebsockets","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/libwebsockets?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.3-1.1ubuntu0.1~esm2"}]}],"versions":["4.3.2-4","4.3.3-1","4.3.3-1.1build1","4.3.3-1.1build2","4.3.3-1.1build3","4.3.3-1.1ubuntu0.1~esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"libwebsockets-evlib-ev","binary_version":"4.3.3-1.1ubuntu0.1~esm2"},{"binary_name":"libwebsockets-evlib-glib","binary_version":"4.3.3-1.1ubuntu0.1~esm2"},{"binary_name":"libwebsockets-evlib-uv","binary_version":"4.3.3-1.1ubuntu0.1~esm2"},{"binary_name":"libwebsockets-test-server","binary_version":"4.3.3-1.1ubuntu0.1~esm2"},{"binary_name":"libwebsockets-test-server-common","binary_version":"4.3.3-1.1ubuntu0.1~esm2"},{"binary_version":"4.3.3-1.1ubuntu0.1~esm2","binary_name":"libwebsockets19t64"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:24.04:LTS","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-10650"},{"id":"CVE-2026-78161","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","type":"CVSS_V3"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P"},{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8822-1.json"}},{"package":{"name":"libwebsockets","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libwebsockets?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.5-3ubuntu1.1"}]}],"versions":["4.3.5-1","4.3.5-3","4.3.5-3ubuntu1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libwebsockets-evlib-ev","binary_version":"4.3.5-3ubuntu1.1"},{"binary_name":"libwebsockets-evlib-glib","binary_version":"4.3.5-3ubuntu1.1"},{"binary_name":"libwebsockets-evlib-uv","binary_version":"4.3.5-3ubuntu1.1"},{"binary_name":"libwebsockets-test-server","binary_version":"4.3.5-3ubuntu1.1"},{"binary_version":"4.3.5-3ubuntu1.1","binary_name":"libwebsockets-test-server-common"},{"binary_version":"4.3.5-3ubuntu1.1","binary_name":"libwebsockets19t64"}]},"database_specific":{"cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-10650"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"},{"score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","type":"CVSS_V4"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-78161"}],"ecosystem":"Ubuntu:26.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8822-1.json"}}],"schema_version":"1.9.0"}