CVE-2026-111624
CVE-2026-111624 · Umbraco CMS before 17.7.1 and 18.2.1 Missing Authorization on SignalR Hubs
Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.
Umbraco CMS before 17.7.1 and 18.2.1 contains a missing authorization vulnerability that allows unauthenticated clients to connect to the backoffice PreviewHub and BackofficeHub SignalR hubs. Attackers can complete the SignalR negotiate step and receive refreshed notifications that disclose content keys, including unpublished content, and reveal editorial activity timing.
CVSS 6.3 · Media · EPSS 0,3% · Corrección disponible
- Publicación
- Actualización
Productos y versiones afectados
umbraco-cms
- Versiones
- ≥ 17.0.0, < 17.7.1: Afectada (semver)
- ≥ 18.0.0, < 18.2.1: Afectada (semver)
Actualiza a 17.7.1; Actualiza a 18.2.1
Fuentes originales
- https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-4c5q-6c64-96j7
- https://github.com/umbraco/Umbraco-CMS/blob/release-18.2.0/src/Umbraco.Cms.Api.Management/Preview/PreviewHub.cs#L9-L11
- https://github.com/umbraco/Umbraco-CMS/blob/release-18.2.0/src/Umbraco.Cms.Api.Management/Preview/PreviewHubUpdater.cs#L58
- https://github.com/umbraco/Umbraco-CMS/commit/b4f6cfc9d0955f9d8443e68353db4a692e91bd94
- https://github.com/umbraco/Umbraco-CMS/commit/243e082479c777d0f585bbd2f8db571607767b22
- https://github.com/umbraco/Umbraco-CMS/releases/tag/release-18.2.1
- https://github.com/umbraco/Umbraco-CMS/releases/tag/release-17.7.1
- https://www.vulncheck.com/advisories/umbraco-cms-before-17.7.1-and-18.2.1-missing-authorization-on-signalr-hubs
- https://nvd.nist.gov/vuln/detail/CVE-2026-111624