{"id":"CVE-2026-46609","aliases":["EUVD-2026-36070","GHSA-vr9v-27gg-qgx4"],"status":"published","title":"Umbraco.Cms: XSS/HTML Injection in Umbraco Backoffice confirmation dialog","description":"Umbraco is an ASP.NET CMS. From version 14.0.0 to before version 17.4.0, authenticated users are able to inject HTML into an input field, which is rendered in the confirmation dialog without proper output encoding. This issue has been patched in version 17.4.0.","severity":{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00136,"percentile":0.03053,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2026-05-21T20:43:06Z","modified":"2026-10-28T02:31:00Z","fixes":[{"ecosystem":"NuGet","package":"Umbraco.Cms","fixed_in":["17.4.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"NuGet","package":"Umbraco.Cms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"14.0.0"},{"last_affected":"17.3.5"},{"fixed":"17.4.0"}]}]},{"source":"osv","ecosystem":"NuGet","package":"Umbraco.Cms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"14.0.0"},{"fixed":"17.4.0"}]}],"versions":["14.0.0","14.1.0","14.1.0-rc","14.1.0-rc2","14.1.1","14.1.2","14.2.0","14.2.0-rc","14.2.0-rc2","14.2.0-rc3","14.3.0","14.3.0-rc","14.3.1","14.3.2","14.3.3","14.3.4","15.0.0","15.0.0-rc1","15.0.0-rc2","15.0.0-rc3","15.0.0-rc4","15.1.0","15.1.0-rc","15.1.0-rc2","15.1.1","15.1.2","15.2.0","15.2.0-rc","15.2.1","15.2.2","15.2.3","15.3.0","15.3.0-rc","15.3.0-rc2","15.3.1","15.4.0","15.4.0-rc","15.4.0-rc2","15.4.1","15.4.2","15.4.3","15.4.4","16.0.0","16.0.0-rc","16.0.0-rc2","16.0.0-rc3","16.0.0-rc4","16.0.0-rc5","16.0.0-rc6","16.1.0","16.1.0-rc","16.1.1","16.2.0","16.2.0-rc","16.2.0-rc2","16.3.0","16.3.0-rc","16.3.0-rc2","16.3.0-rc3","16.3.0-rc4","16.3.1","16.3.2","16.3.3","16.3.4","16.4.0","16.4.0-rc","16.4.0-rc2","16.4.1","16.5.0","16.5.0-rc","16.5.1","17.0.0","17.0.0-beta","17.0.0-rc1","17.0.0-rc2","17.0.0-rc3","17.0.0-rc4","17.0.1","17.0.2","17.1.0","17.1.0-rc","17.2.0","17.2.0-rc","17.2.0-rc2","17.2.1","17.2.2","17.3.0","17.3.0-rc","17.3.0-rc2","17.3.0-rc3","17.3.1","17.3.2","17.3.3","17.3.4","17.3.5","17.4.0-rc","17.4.0-rc2","17.4.0-rc3"]}],"products":[{"vendor":"umbraco","product":"umbraco-cms"},{"vendor":"umbraco","product":"umbraco_cms"}],"references":[{"url":"https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-vr9v-27gg-qgx4","tags":["x_refsource_CONFIRM","Vendor Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46609","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-vr9v-27gg-qgx4"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46609.json","tags":["advisory"]},{"url":"https://github.com/umbraco/Umbraco-CMS","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-46609","title":"Umbraco.Cms: XSS/HTML Injection in Umbraco Backoffice confirmation dialog","description":"Umbraco is an ASP.NET CMS. From version 14.0.0 to before version 17.4.0, authenticated users are able to inject HTML into an input field, which is rendered in the confirmation dialog without proper output encoding. This issue has been patched in version 17.4.0.","status":"published","published":"2026-06-10T15:59:03.416Z","modified":"2026-06-10T18:08:11.096Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T13:46:55.086623Z"}],"euvd":[{"id":"EUVD-2026-36070","description":"Umbraco is an ASP.NET CMS. From version 14.0.0 to before version 17.4.0, authenticated users are able to inject HTML into an input field, which is rendered in the confirmation dialog without proper output encoding. This issue has been patched in version 17.4.0.","status":"published","published":"2026-06-10T15:59:03Z","modified":"2026-06-10T18:08:11Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T18:20:44.937217Z"}],"ghsa":[{"id":"GHSA-vr9v-27gg-qgx4","title":"Umbraco.Cms: XSS/HTML Injection in Umbraco Backoffice confirmation dialog","description":"### Impact\nAuthenticated users are able to inject HTML vulnerability into an input field, which is rendered in the confirmation dialog without proper output encoding.\n\n### Patches\nThis issue has been patched in 17.4.0","status":"published","published":"2026-05-21T20:43:06Z","modified":"2026-06-10T18:41:34Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:40:24.856614Z"}],"nvd":[{"id":"CVE-2026-46609","description":"Umbraco is an ASP.NET CMS. From version 14.0.0 to before version 17.4.0, authenticated users are able to inject HTML into an input field, which is rendered in the confirmation dialog without proper output encoding. This issue has been patched in version 17.4.0.","status":"published","published":"2026-06-10T17:16:37.123Z","modified":"2026-10-26T11:10:00.157Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:23.485267Z"}],"osv":[{"id":"CVE-2026-46609","title":"Umbraco.Cms: XSS/HTML Injection in Umbraco Backoffice confirmation dialog","description":"Umbraco is an ASP.NET CMS. From version 14.0.0 to before version 17.4.0, authenticated users are able to inject HTML into an input field, which is rendered in the confirmation dialog without proper output encoding. This issue has been patched in version 17.4.0.","status":"published","published":"2026-06-10T15:59:03.416Z","modified":"2026-10-28T02:31:00.285037548Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:45:06.231145Z"},{"id":"GHSA-vr9v-27gg-qgx4","title":"Umbraco.Cms: XSS/HTML Injection in Umbraco Backoffice confirmation dialog","description":"### Impact\nAuthenticated users are able to inject HTML vulnerability into an input field, which is rendered in the confirmation dialog without proper output encoding.\n\n### Patches\nThis issue has been patched in 17.4.0","status":"published","published":"2026-05-21T20:43:06Z","modified":"2026-06-10T18:46:55.389617633Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:46:57.694388Z"}]}}