{"id":"GHSA-8j9v-h2vp-2hhv","summary":"XSS in HtmlSanitizer","details":"### Impact\n\nIf you have explicitly allowed the `\u003cstyle\u003e` tag, an attacker could craft HTML that includes script after passing through the sanitizer. The default settings disallow the `\u003cstyle\u003e` tag so there is no risk if you have not explicitly allowed the `\u003cstyle\u003e` tag.\n\n### Patches\n\nThe problem has been fixed in version 5.0.372.\n\n### Workarounds\n\nRemove the `\u003cstyle\u003e` tag from the set of allowed tags.\n\n### For more information\n\nIf you have any questions or comments about this advisory open an issue in https://github.com/mganss/HtmlSanitizer\n\n### Credits\n\nThis issue was discovered by Michal Bentkowski of Securitum.","aliases":["CVE-2020-26293"],"modified":"2026-09-10T03:49:14.279031332Z","published":"2021-01-04T18:22:11Z","database_specific":{"severity":"LOW","github_reviewed":true,"github_reviewed_at":"2021-01-04T18:21:52Z","nvd_published_at":"2021-01-04T19:15:00Z","cwe_ids":["CWE-74","CWE-79"]},"references":[{"type":"WEB","url":"https://github.com/mganss/HtmlSanitizer/security/advisories/GHSA-8j9v-h2vp-2hhv"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-26293"},{"type":"WEB","url":"https://github.com/mganss/HtmlSanitizer/commit/a3a7602a44d4155d51ec0fbbedc2a49e9c7e2eb8"},{"type":"WEB","url":"https://github.com/mganss/HtmlSanitizer/releases/tag/v5.0.372"},{"type":"WEB","url":"https://www.nuget.org/packages/HtmlSanitizer"}],"affected":[{"package":{"name":"HtmlSanitizer","ecosystem":"NuGet","purl":"pkg:nuget/HtmlSanitizer"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.0.372"}]}],"versions":["1.0.4925.29815","1.0.4927.30873","1.1.5243.28448","1.1.5297.28403","1.1.5338.17998","2.0.5449.20550","2.0.5548.24932","2.0.5595.22183","2.0.5595.30325","2.0.5623.30465","2.0.5735.24296","3.0.5781.31354-beta","3.0.66-beta","3.1.67-beta","3.1.75-beta","3.1.76","3.1.79","3.1.91","3.1.93","3.1.98","3.2.100-beta","3.2.103","3.2.105","3.2.96-beta","3.3.122-beta","3.3.125-beta","3.3.126-beta","3.3.127-beta","3.3.128-beta","3.3.129-beta","3.3.130-beta","3.3.131-beta","3.3.132-beta","3.3.142","3.3.143-beta","3.3.144-beta","3.3.145-beta","3.3.146-beta","3.3.147-beta","3.3.148-beta","3.4.152-beta","3.4.156","3.5.168-beta","3.5.169-beta","4.0.179","4.0.180","4.0.181","4.0.182","4.0.183","4.0.185","4.0.187","4.0.197","4.0.199","4.0.201","4.0.204","4.0.205","4.0.207","4.0.210","4.0.217","5.0.215-beta","5.0.218-beta","5.0.250-beta","5.0.266-beta","5.0.274-beta","5.0.298","5.0.304","5.0.310","5.0.319","5.0.331","5.0.342","5.0.343","5.0.353","5.0.355"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/01/GHSA-8j9v-h2vp-2hhv/GHSA-8j9v-h2vp-2hhv.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N"}]}