SB20261111158 - Server-Side Request Forgery (SSRF) in Microsoft Agent Framework SDK - dotnet
Published: November 11, 2026
Security Bulletin ID
SB20261111158
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Server-Side Request Forgery (SSRF) (CVE-ID: CVE-2026-109485)
CWE-ID: CWE-918 - Server-Side Request Forgery (SSRF)
CVSSv4: 6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N]
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to server-side request forgery in Microsoft 365 Agents SDK when handling network requests. A remote user can induce the server to make requests to unintended destinations to disclose sensitive information.
Remediation
Install update from vendor's website.