rootpwn

medium · CVSS v3 3.7 · CVSS v4 6.3 · EPSS 0.00309

CVE-2026-111624

Umbraco CMS before 17.7.1 and 18.2.1 contains a missing authorization vulnerability that allows unauthenticated clients …

Description

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can complete the SignalR negotiate step and receive refreshed notifications that disclose content keys, including unpublished content, and reveal editorial activity timing.

Scores

Severity
medium
CVSS v2
2.6
CVSS v3
3.7
CVSS v4
6.3
EPSS
0.00309

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