Microsoft 365 Agents SDK Information Disclosure Vulnerability

Summary

Server-side request forgery (ssrf) in Microsoft 365 Agents SDK allows an authorized attacker to disclose information over a network.

Products covered

• Microsoft Agent Framework SDK - dotnet

Remediation

Release Notes

Vendor-listed fixes

• 1.8.77

CVEs in this advisory 1

CVE-2026-109485

Updates

1. Nov 10, 2026 at 8:00 AM UTC
   Published by Microsoft Security Response Center

   The publication date reported by the vendor.

2. Nov 10, 2026 at 8:15 PM UTC
   Added to SecurityAlert

   We collected the advisory from the official source.