SB2026090905 - Privilege escalation in Microsoft Azure Arc SQL Server Extension
Published: September 9, 2026
Security Bulletin ID
SB2026090905
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Overly permissive cross-domain whitelist (CVE-ID: CVE-2026-62895)
CWE-ID: CWE-942 - Overly Permissive Cross-domain Whitelist
CVSSv4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to bypass the CORS protection mechanism.
The vulnerability exists due to permissive cross-domain policy with untrusted domains in Azure Arc. A remote attacker can trick a victim to visit a malicous website and run arbitrary commands with elevated privileges.
Remediation
Install update from vendor's website.