{"action":"Upgrade Umbraco.Cms to 16.5.1 (16.x) or 17.2.2 (17.x) or later.","affected":[{"fixed":"16.5.1","introduced":"16.2.0"},{"fixed":"17.2.2","introduced":"17.0.0"}],"component":"Umbraco.Cms","cve_ids":["CVE-2026-31833"],"ecosystem":"NuGet","epss":0.00276,"exploited":false,"fixed_versions":["16.5.1","17.2.2"],"ghsa_id":"GHSA-vrqc-59mw-qqg7","id":"tcs_01M5N92RF9C9GXYN536QRGZHXS","modified_at":"2026-03-13T08:11:23.767315Z","published_at":"2026-03-11T14:54:00Z","references":["https://osv.dev/vulnerability/GHSA-vrqc-59mw-qqg7","https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-vrqc-59mw-qqg7","https://nvd.nist.gov/vuln/detail/CVE-2026-31833","https://github.com/umbraco/Umbraco-CMS"],"severity":{"label":"medium","score":6.7},"sources":[{"source":"osv","source_id":"GHSA-vrqc-59mw-qqg7","url":"https://osv.dev/vulnerability/GHSA-vrqc-59mw-qqg7"}],"summary":"Umbraco has Stored XSS in UFM Rendering Pipeline via Permissive DOMPurify Attribute Filtering"}