{"id":"UBUNTU-CVE-2026-48801","details":"linkify-it is a links recognition library with full Unicode support. Prior to 5.0.1, LinkifyIt.prototype.match, the package's primary public API, has O(N²) algorithmic complexity for inputs containing many fuzzy links or emails because the JavaScript-level scan loop re-slices input and re-runs unanchored regex searches on progressively shorter tails. Any service that synchronously renders untrusted Markdown with linkify:true on a request hot path can inherit a worker-process denial of service triggerable by a tens-of-KB request body. This issue is fixed in version 5.0.1.","modified":"2026-08-07T17:45:14.583018738Z","published":"2026-07-14T21:17:00Z","upstream":["CVE-2026-48801"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-48801"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-48801"},{"type":"REPORT","url":"https://github.com/markdown-it/linkify-it/commit/6be6d15e0641bf1daeaa977d500cabc743166159"},{"type":"REPORT","url":"https://github.com/markdown-it/linkify-it/security/advisories/GHSA-22p9-wv53-3rq4"}],"affected":[{"package":{"name":"node-markdown-it","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/node-markdown-it?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["10.0.0+dfsg-2","10.0.0+dfsg-3","10.0.0+dfsg-3.1","10.0.0+dfsg-4","10.0.0+dfsg-5","10.0.0+dfsg-6"],"ecosystem_specific":{"binaries":[{"binary_name":"node-markdown-it","binary_version":"10.0.0+dfsg-6"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48801.json"}},{"package":{"name":"node-markdown-it","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/node-markdown-it?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["22.2.3+dfsg+~12.2.3-2"],"ecosystem_specific":{"binaries":[{"binary_name":"node-markdown-it","binary_version":"22.2.3+dfsg+~12.2.3-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48801.json"}},{"package":{"name":"node-markdown-it","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/node-markdown-it?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["22.2.3+dfsg+~12.2.3-2","22.2.3+dfsg+~12.2.3-4"],"ecosystem_specific":{"binaries":[{"binary_name":"node-markdown-it","binary_version":"22.2.3+dfsg+~12.2.3-4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48801.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:H/SC:N/SI:N/SA:N"},{"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"}]}