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    CVE-2026-47300

    Incorrect implementation of authentication algorithm in ASP.NET Core allows an authorized attacker to elevate privileges over a network.

    Published:Jul 14, 2026
    Last Modified:Aug 7, 2026
    EPS:Jul 14, 2026
    EPSS Score:0.00527
    CVSS Score:8.8

    Affected Products

    Vendor
    Microsoft
    Product
    .net
    Vendor
    Microsoft
    Product
    Microsoft Visual Studio 2022
    Vendor
    Microsoft
    Product
    Microsoft Visual Studio 2026
    Vendor
    Microsoft
    Product
    Visual Studio 2022
    Vendor
    Microsoft
    Product
    Visual Studio 2026
    Vendor
    Redhat
    Product
    Hummingbird

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-90 Reflection Attack in Authentication Protocol

    Related CVEs

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    CVE-2026-69806 (CVSS 7) — Exposure of sensitive information to an unauthorized actor in .NET allows an authorized attacker to elevate pr…
    CVE-2026-62898 (CVSS 7.5) — Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network.…
    CVE-2026-70354 (CVSS 7.8) — Out-of-bounds write in .NET allows an unauthorized attacker to execute code locally.…
    CVE-2026-65810 (CVSS 7.8) — Relative path traversal in .NET Framework allows an unauthorized attacker to elevate privileges locally.…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High