{"id":"CVE-2026-48801","revision":"ab15ad704a4c45f28c0c71b20ff8c3ed","records":[{"revision":"ab15ad704a4c45f28c0c71b20ff8c3ed","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-48801","aliases":[],"title":"linkify-it: Quadratic algorithmic complexity in LinkifyIt#match scan loop","description":"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.","state":0,"publishedAt":"2026-07-14T20:03:56.43+00:00","modifiedAt":"2026-07-15T12:56:15.25+00:00","affected":[{"ecosystem":"Vendor product","name":"linkify-it","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"markdown-it\",\n                    \"product\": \"linkify-it\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 5.0.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":8.7,"severity":"HIGH"}],"references":["https://github.com/markdown-it/linkify-it/security/advisories/GHSA-22p9-wv53-3rq4","https://github.com/markdown-it/linkify-it/commit/6be6d15e0641bf1daeaa977d500cabc743166159"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-48801","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-48801","identifiers":["CVE-2026-48801"]},"retained":false,"historicalAffected":[]}],"coverage":[]}