CVE-2026-111624
CVE-2026-111624 · Umbraco CMS before 17.7.1 and 18.2.1 Missing Authorization on SignalR Hubs
Cette page présente des faits issus de sources publiques. Consultez l’avis original avant toute mise à jour.
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can complete the SignalR negotiate step and receive refreshed notifications that disclose content keys, including unpublished content, and reveal editorial activity timing.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 · Moyenne · EPSS 0,3% · Correctif disponible
- Publication
- Mise à jour
Produits et versions concernés
umbraco-cms
- Versions du logiciel
- ≥ 17.0.0, < 17.7.1: Concernée (semver)
- ≥ 18.0.0, < 18.2.1: Concernée (semver)
Mettez à jour vers 17.7.1; Mettez à jour vers 18.2.1
Sources 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