CVE-2026-86158

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...

EUVD-2026-88649

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...

CVE-2026-86158

Progress Software Fiddler Everywhere 8.0.2 contains a vulnerability due to missing authentication in its local .NET backend (Fiddler.WebUi ). A local unauthenticated attacker can exploit unauthenticated localhost HTTP and SignalR RPC channels to mint OAuth tokens and read the machine-in-the-middl...

CVE-2026-86158: Missing Authentication for Critical Function

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...