Missing Authorization in Hub - CVE-2026-100266
Published: October 2, 2026
Vulnerability identifier: #VU153132
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-100266
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to send arbitrary emails from the server's trusted address.
The vulnerability exists due to missing authorization in Hub when sending emails. A remote user can send arbitrary emails from the server's trusted address to send arbitrary emails from the server's trusted address.
Affected software
Hub
How to mitigate CVE-2026-100266
Install security update from vendor's website.
Hub - update to 2026.2.52366