{"id":"UBUNTU-CVE-2026-109563","details":"N3.js before 2.11.1 contains a regular expression denial of service vulnerability in the N3Lexer number pattern that backtracks quadratically on long digit runs. Attackers can supply untrusted Turtle or N3 input containing long runs of digits that do not end a number, blocking the Node.js event loop and causing denial of service.","modified":"2026-10-17T12:59:50.065694576Z","published":"2026-10-12T21:17:00Z","upstream":["CVE-2026-109563"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-109563"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-109563"},{"type":"REPORT","url":"https://github.com/rdfjs/N3.js"},{"type":"REPORT","url":"https://github.com/rdfjs/N3.js/commit/b1c497fddb02c4772d61916bd2634115f45f424d"},{"type":"REPORT","url":"https://github.com/rdfjs/N3.js/pull/760"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/n3-js-before-2.11.1-redos-via-n3lexer-numeric-literal-regex"}],"affected":[{"package":{"name":"node-n3","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/node-n3?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.4-1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.0.4-1","binary_name":"libjs-n3"},{"binary_name":"node-n3","binary_version":"1.0.4-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109563.json"}},{"package":{"name":"node-n3","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/node-n3?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.4-3","1.13.0+~1.2.3+~1.10.4-1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.13.0+~1.2.3+~1.10.4-1","binary_name":"libjs-n3"},{"binary_name":"node-n3","binary_version":"1.13.0+~1.2.3+~1.10.4-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109563.json"}},{"package":{"name":"node-n3","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/node-n3?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.16.3+~1.2.3+~1.10.4-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libjs-n3","binary_version":"1.16.3+~1.2.3+~1.10.4-1"},{"binary_name":"node-n3","binary_version":"1.16.3+~1.2.3+~1.10.4-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109563.json"}},{"package":{"name":"node-n3","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/node-n3?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.16.3+~1.2.3+~1.10.4-3"],"ecosystem_specific":{"binaries":[{"binary_version":"1.16.3+~1.2.3+~1.10.4-3","binary_name":"libjs-n3"},{"binary_name":"node-n3","binary_version":"1.16.3+~1.2.3+~1.10.4-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109563.json"}},{"package":{"name":"node-n3","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/node-n3?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.16.3+~1.2.3+~1.10.4-1","1.16.3+~1.2.3+~1.10.4-2","1.16.3+~1.2.3+~1.10.4-3"],"ecosystem_specific":{"binaries":[{"binary_name":"libjs-n3","binary_version":"1.16.3+~1.2.3+~1.10.4-3"},{"binary_name":"node-n3","binary_version":"1.16.3+~1.2.3+~1.10.4-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109563.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}