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.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 30 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 30 Sep 2026 15:30:00 +0000


Wed, 30 Sep 2026 14:30:00 +0000


Tue, 29 Sep 2026 13:30:00 +0000

Type Values Removed Values Added
First Time appeared Progress Software
Progress Software progress Telerik Fiddler Everywhere
Vendors & Products Progress Software
Progress Software progress Telerik Fiddler Everywhere

Tue, 29 Sep 2026 06:45:00 +0000

Type Values Removed Values Added
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.
Title Missing Authentication in the local .NET backend of Progress Telerik Fiddler Everywhere
Weaknesses CWE-306
References
Metrics cvssV3_1

{'score': 7.7, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: ProgressSoftware

Published:

Updated: 2026-09-30T15:28:20.211Z

Reserved: 2026-09-05T09:09:33.404Z

Link: CVE-2026-86158

cve-icon Vulnrichment

Updated: 2026-09-30T15:27:26.474Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-29T07:16:35.520

Modified: 2026-09-30T16:19:21.907

Link: CVE-2026-86158

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-29T13:19:13Z

Weaknesses