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    4 vulnerabilities found for Progress® Telerik® Fiddler® Everywhere by Progress Software

    CVE-2026-86158 (GCVE-0-2026-86158)

    Vulnerability from nvd – Published: 2026-09-29 06:34 – Updated: 2026-09-30 15:28
    VLAI
    Title
    Missing Authentication in the local .NET backend of Progress Telerik Fiddler Everywhere
    Summary
    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.
    Severity
    7.7 (High)
    CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-30 15:18 UTC
    CWE
    • CWE-306 - Missing Authentication for Critical Function
    Assigner
    References
    Impacted products
    Credits
    Ezinne Kalu (github.com/zikk090)
    Show details on NVD website
    To clipboard 

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    CVE-2026-86157 (GCVE-0-2026-86157)

    Vulnerability from nvd – Published: 2026-09-29 06:34 – Updated: 2026-09-30 15:28
    VLAI
    Title
    Exposure of Privileged IPC Functionality in Progress Telerik Fiddler Everywhere
    Summary
    Exposure of privileged IPC functionality in Progress Telerik Fiddler Everywhere before version 8.2.0 allows a local, low-privileged attacker who can modify application launch parameters and persuade a user to start the application to replace the application UI or settings with attacker-controlled content. Successful exploitation could result in disclosure of OAuth authentication tokens, execution of locally accessible programs, or unauthorized modification of application-generated configuration files.
    Severity
    5.6 (Medium)
    CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-30 15:18 UTC
    CWE
    • CWE-749 - Exposed Dangerous Method or Function
    Assigner
    References
    Impacted products
    Credits
    Ezinne Kalu (github.com/zikk090)
    Show details on NVD website
    To clipboard 

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    CVE-2026-86158 (GCVE-0-2026-86158)

    Vulnerability from cvelistv5 – Published: 2026-09-29 06:34 – Updated: 2026-09-30 15:28
    VLAI
    Title
    Missing Authentication in the local .NET backend of Progress Telerik Fiddler Everywhere
    Summary
    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.
    Severity
    7.7 (High)
    CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-30 15:18 UTC
    CWE
    • CWE-306 - Missing Authentication for Critical Function
    Assigner
    References
    Impacted products
    Credits
    Ezinne Kalu (github.com/zikk090)
    Show details on NVD website
    To clipboard 

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    CVE-2026-86157 (GCVE-0-2026-86157)

    Vulnerability from cvelistv5 – Published: 2026-09-29 06:34 – Updated: 2026-09-30 15:28
    VLAI
    Title
    Exposure of Privileged IPC Functionality in Progress Telerik Fiddler Everywhere
    Summary
    Exposure of privileged IPC functionality in Progress Telerik Fiddler Everywhere before version 8.2.0 allows a local, low-privileged attacker who can modify application launch parameters and persuade a user to start the application to replace the application UI or settings with attacker-controlled content. Successful exploitation could result in disclosure of OAuth authentication tokens, execution of locally accessible programs, or unauthorized modification of application-generated configuration files.
    Severity
    5.6 (Medium)
    CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-30 15:18 UTC
    CWE
    • CWE-749 - Exposed Dangerous Method or Function
    Assigner
    References
    Impacted products
    Credits
    Ezinne Kalu (github.com/zikk090)
    Show details on NVD website
    To clipboard 

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    }
  },
  "cveMetadata": {
    "assignerOrgId": "f9fea0b6-671e-4eea-8fde-31911902ae05",
    "assignerShortName": "ProgressSoftware",
    "cveId": "CVE-2026-86157",
    "datePublished": "2026-09-29T06:34:17.555Z",
    "dateReserved": "2026-09-05T09:09:32.191Z",
    "dateUpdated": "2026-09-30T15:28:20.346Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}