Go through 1.15.12 and 1.16.x through 1.16.4 has a golang.org/x/net/html infinite loop via crafted ParseFragment input.
{ "nvd_published_at": "2021-05-26T15:15:00Z", "cwe_ids": [ "CWE-835" ], "severity": "HIGH", "github_reviewed": true, "github_reviewed_at": "2023-02-08T00:33:11Z" }