{"id":"UBUNTU-CVE-2026-54463","details":"websocket-driver is a WebSocket protocol handler with pluggable I/O. Prior to 0.8.1, draft versions of the WebSocket protocol in websocket-driver include a length header that allows an arbitrarily large integer to be encoded as bytes with the high bit set, and a server or client can send an indefinite sequence of 0x80 or higher bytes that the peer parses into an ever-growing Ruby integer. This can make a WebSocket connection consume an unbounded amount of memory and lead to the host process running out of memory. This issue is fixed in version 0.8.1.","modified":"2026-08-07T17:45:15.016636881Z","published":"2026-07-17T20:17:00Z","upstream":["CVE-2026-54463"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-54463"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-54463"},{"type":"REPORT","url":"https://github.com/faye/websocket-driver-ruby/security/advisories/GHSA-ghhp-3qvg-889p"}],"affected":[{"package":{"name":"ruby-websocket-driver","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/ruby-websocket-driver?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.3-1","0.6.3-1build1","0.6.3-2","0.6.3-2build1"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-websocket-driver","binary_version":"0.6.3-2build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54463.json"}},{"package":{"name":"ruby-websocket-driver","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/ruby-websocket-driver?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.3-2build1","0.6.3-2build2","0.6.3-2build3"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-websocket-driver","binary_version":"0.6.3-2build3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54463.json"}},{"package":{"name":"ruby-websocket-driver","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/ruby-websocket-driver?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.3-2build3","0.6.3-2build4"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-websocket-driver","binary_version":"0.6.3-2build4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54463.json"}},{"package":{"name":"ruby-websocket-driver","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/ruby-websocket-driver?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.3-3build1","0.6.3-3build2","0.6.3-3build3"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-websocket-driver","binary_version":"0.6.3-3build3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54463.json"}},{"package":{"name":"ruby-websocket-driver","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/ruby-websocket-driver?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.3-3build5","0.6.3-3build6","0.6.3-3build7"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-websocket-driver","binary_version":"0.6.3-3build7"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54463.json"}},{"package":{"name":"ruby-websocket-driver","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/ruby-websocket-driver?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.3-3ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-websocket-driver","binary_version":"0.6.3-3ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54463.json"}}],"schema_version":"1.8.0","severity":[{"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:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}