[ CVE-2026-86158 · Published 29 Sep 2026 ]
Vulnerability in Progress Software Progress® Telerik® Fiddler® Everywhere
CVSS 7.7
EPSS <1%No fix listed yet
[ Description ]Official description
Missing authentication in the local .NET backend (Fiddler.WebUi) of Progress Software Fiddler Everywhere 8.0.2 allows a local unauthenticated attacker to mint OAuth tokens and read the machine-in-the-middle root certificate through an unauthenticated localhost HTTP and SignalR RPC channel.
[ Fixes ]Fixes and patches
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.