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TI-2026-33262 Aliases CVE-2026-45491GHSA-7q4v-2mr6-5gpx

.NET Tampering Vulnerability

Priority LOW 28CWE-59Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Tampering
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub, Red Hat and Microsoft. Impact type from Microsoft.

Summary

Improper link resolution before file access ('link following') in .NET allows an unauthorized attacker to perform tampering locally.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00388 33rd percentileScored 2026-11-07
Fix Fixed Microsoft.NETCore.App.Runtime.linux-x64 (NuGet): 8.0.28, 9.0.17, 10.0.9Microsoft.NETCore.App.Runtime.win-x64 (NuGet): 8.0.28, 9.0.17, 10.0.9+1 more productRed Hat: 17 advisoriesMicrosoft: 3 updates

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Microsoft.NET 10.010.0.0 to before 10.0.910.0.9Patch availableCNA
Microsoft.NET 8.08.0 to before 8.0.288.0.28Patch availableCNA
Microsoft.NET 8.08.0.0 to before 8.0.288.0.28Patch availableCNA
Microsoft.NET 9.09.0.0 to before 9.0.179.0.17Patch availableCNA
—Microsoft.NETCore.App.Runtime.linux-x64 (NuGet)8.0.0 to before 8.0.288.0.28Patch availableGHSA-7q4v-2mr6-5gpx
—Microsoft.NETCore.App.Runtime.linux-x64 (NuGet)9.0.0 to before 9.0.179.0.17Patch availableGHSA-7q4v-2mr6-5gpx
—Microsoft.NETCore.App.Runtime.linux-x64 (NuGet)10.0.0 to before 10.0.910.0.9Patch availableGHSA-7q4v-2mr6-5gpx
—Microsoft.NETCore.App.Runtime.win-x64 (NuGet)8.0.0 to before 8.0.288.0.28Patch availableGHSA-7q4v-2mr6-5gpx
—Microsoft.NETCore.App.Runtime.win-x64 (NuGet)9.0.0 to before 9.0.179.0.17Patch availableGHSA-7q4v-2mr6-5gpx
—Microsoft.NETCore.App.Runtime.win-x64 (NuGet)10.0.0 to before 10.0.910.0.9Patch availableGHSA-7q4v-2mr6-5gpx
—Microsoft.NETCore.App.Runtime.osx-arm64 (NuGet)8.0.0 to before 8.0.288.0.28Patch availableGHSA-7q4v-2mr6-5gpx
—Microsoft.NETCore.App.Runtime.osx-arm64 (NuGet)9.0.0 to before 9.0.179.0.17Patch availableGHSA-7q4v-2mr6-5gpx
—Microsoft.NETCore.App.Runtime.osx-arm64 (NuGet)10.0.0 to before 10.0.910.0.9Patch availableGHSA-7q4v-2mr6-5gpx
  • .NET 10.0 VendorMicrosoft Affected 10.0.0 to before 10.0.9 Fixed in 10.0.9 Patch available CNA
  • .NET 8.0 VendorMicrosoft Affected 8.0 to before 8.0.28 Fixed in 8.0.28 Patch available CNA
  • .NET 8.0 VendorMicrosoft Affected 8.0.0 to before 8.0.28 Fixed in 8.0.28 Patch available CNA
  • .NET 9.0 VendorMicrosoft Affected 9.0.0 to before 9.0.17 Fixed in 9.0.17 Patch available CNA
  • Microsoft.NETCore.App.Runtime.linux-x64 (NuGet) Vendor— Affected 8.0.0 to before 8.0.28 Fixed in 8.0.28 Patch available GHSA-7q4v-2mr6-5gpx
  • Microsoft.NETCore.App.Runtime.linux-x64 (NuGet) Vendor— Affected 9.0.0 to before 9.0.17 Fixed in 9.0.17 Patch available GHSA-7q4v-2mr6-5gpx
  • Microsoft.NETCore.App.Runtime.linux-x64 (NuGet) Vendor— Affected 10.0.0 to before 10.0.9 Fixed in 10.0.9 Patch available GHSA-7q4v-2mr6-5gpx
  • Microsoft.NETCore.App.Runtime.win-x64 (NuGet) Vendor— Affected 8.0.0 to before 8.0.28 Fixed in 8.0.28 Patch available GHSA-7q4v-2mr6-5gpx
  • Microsoft.NETCore.App.Runtime.win-x64 (NuGet) Vendor— Affected 9.0.0 to before 9.0.17 Fixed in 9.0.17 Patch available GHSA-7q4v-2mr6-5gpx
  • Microsoft.NETCore.App.Runtime.win-x64 (NuGet) Vendor— Affected 10.0.0 to before 10.0.9 Fixed in 10.0.9 Patch available GHSA-7q4v-2mr6-5gpx
  • Microsoft.NETCore.App.Runtime.osx-arm64 (NuGet) Vendor— Affected 8.0.0 to before 8.0.28 Fixed in 8.0.28 Patch available GHSA-7q4v-2mr6-5gpx
  • Microsoft.NETCore.App.Runtime.osx-arm64 (NuGet) Vendor— Affected 9.0.0 to before 9.0.17 Fixed in 9.0.17 Patch available GHSA-7q4v-2mr6-5gpx
  • Microsoft.NETCore.App.Runtime.osx-arm64 (NuGet) Vendor— Affected 10.0.0 to before 10.0.9 Fixed in 10.0.9 Patch available GHSA-7q4v-2mr6-5gpx

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*8.0.0 to before 8.0.28; 9.0.0 to before 9.0.17; 10.0.0 to before 10.0.9VulnerableMicrosoft
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*not specified by NVDRunning onApple
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*not specified by NVDRunning onLinux
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
  • cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* Versions 8.0.0 to before 8.0.28; 9.0.0 to before 9.0.17; 10.0.0 to before 10.0.9 Vulnerable ·Microsoft
  • cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Apple
  • cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Linux
  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

  • Fix · GHSA-7q4v-2mr6-5gpx Microsoft.NETCore.App.Runtime.linux-x64 (NuGet) Fixed in 8.0.28 Advisory →
  • Fix · GHSA-7q4v-2mr6-5gpx Microsoft.NETCore.App.Runtime.linux-x64 (NuGet) Fixed in 9.0.17 Advisory →
  • Fix · GHSA-7q4v-2mr6-5gpx Microsoft.NETCore.App.Runtime.linux-x64 (NuGet) Fixed in 10.0.9 Advisory →
  • Fix · GHSA-7q4v-2mr6-5gpx Microsoft.NETCore.App.Runtime.win-x64 (NuGet) Fixed in 8.0.28 Advisory →
  • Fix · GHSA-7q4v-2mr6-5gpx Microsoft.NETCore.App.Runtime.win-x64 (NuGet) Fixed in 9.0.17 Advisory →
  • Fix · GHSA-7q4v-2mr6-5gpx Microsoft.NETCore.App.Runtime.win-x64 (NuGet) Fixed in 10.0.9 Advisory →
  • Fix · GHSA-7q4v-2mr6-5gpx Microsoft.NETCore.App.Runtime.osx-arm64 (NuGet) Fixed in 8.0.28 Advisory →
  • Fix · GHSA-7q4v-2mr6-5gpx Microsoft.NETCore.App.Runtime.osx-arm64 (NuGet) Fixed in 9.0.17 Advisory →
  • Fix · GHSA-7q4v-2mr6-5gpx Microsoft.NETCore.App.Runtime.osx-arm64 (NuGet) Fixed in 10.0.9 Advisory →

Red Hat 17 advisories

  • RHSA-2026:28051 Released 2026-06-29 · Red Hat rating Important
    .NET 9.0 security update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) dotnet-sdk-9.0-source-built-artifacts-9.0.118-1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) aspnetcore-runtime-9.0-9.0.17-1.el9_6, aspnetcore-runtime-dbg-9.0-9.0.17-1.el9_6, aspnetcore-targeting-pack-9.0-9.0.17-1.el9_6 +12
  • RHSA-2026:28227 Released 2026-06-23 · Red Hat rating Important
    .NET 8.0 security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) aspnetcore-runtime-8.0-8.0.28-1.el9_4, aspnetcore-runtime-dbg-8.0-8.0.28-1.el9_4, aspnetcore-targeting-pack-8.0-8.0.28-1.el9_4 +11
  • RHSA-2026:28011 Released 2026-06-22 · Red Hat rating Important
    .NET 8.0 security update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) dotnet-sdk-8.0-source-built-artifacts-8.0.128-1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) aspnetcore-runtime-8.0-8.0.28-1.el9_6, aspnetcore-runtime-dbg-8.0-8.0.28-1.el9_6, aspnetcore-targeting-pack-8.0-8.0.28-1.el9_6 +9
Show 14 more Red Hat advisories
  • RHSA-2026:28009 Released 2026-06-22 · Red Hat rating Important
    .NET 9.0 security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) aspnetcore-runtime-9.0-9.0.17-1.el10_0, aspnetcore-runtime-dbg-9.0-9.0.17-1.el10_0, aspnetcore-targeting-pack-9.0-9.0.17-1.el10_0 +12
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) dotnet-sdk-9.0-source-built-artifacts-9.0.118-1.el10_0
  • RHSA-2026:28007 Released 2026-06-22 · Red Hat rating Important
    .NET 8.0 security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) aspnetcore-runtime-8.0-8.0.28-1.el10_0, aspnetcore-runtime-dbg-8.0-8.0.28-1.el10_0, aspnetcore-targeting-pack-8.0-8.0.28-1.el10_0 +9
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) dotnet-sdk-8.0-source-built-artifacts-8.0.128-1.el10_0
  • RHSA-2026:26994 Released 2026-06-18 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images dotnet-sdk-8.0-8.0.128-1.hum1@aarch64, dotnet-sdk-8.0-8.0.128-1.hum1@x86_64, dotnet-sdk-8.0-source-built-artifacts-8.0.128-1.hum1@aarch64 +6
  • RHSA-2026:26638 Released 2026-06-17 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images dotnet-sdk-10.0-10.0.109-1.hum1@aarch64, dotnet-sdk-10.0-10.0.109-1.hum1@x86_64, dotnet-sdk-10.0-source-built-artifacts-10.0.109-1.hum1@aarch64 +8
  • RHSA-2026:25222 Released 2026-06-11 · Red Hat rating Important
    .NET 10.0 security update
    • Red Hat Enterprise Linux AppStream (v. 9) aspnetcore-runtime-10.0-10.0.9-1.el9_8, aspnetcore-runtime-dbg-10.0-10.0.9-1.el9_8, aspnetcore-targeting-pack-10.0-10.0.9-1.el9_8 +11
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) dotnet-sdk-10.0-source-built-artifacts-10.0.109-1.el9_8
  • RHSA-2026:25221 Released 2026-06-11 · Red Hat rating Important
    .NET 9.0 security update
    • Red Hat Enterprise Linux AppStream (v. 9) aspnetcore-runtime-9.0-9.0.17-1.el9_8, aspnetcore-runtime-dbg-9.0-9.0.17-1.el9_8, aspnetcore-targeting-pack-9.0-9.0.17-1.el9_8 +11
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) dotnet-sdk-9.0-source-built-artifacts-9.0.118-1.el9_8
  • RHSA-2026:25220 Released 2026-06-11 · Red Hat rating Important
    .NET 8.0 security update
    • Red Hat Enterprise Linux AppStream (v. 9) aspnetcore-runtime-8.0-8.0.28-1.el9_8, aspnetcore-runtime-dbg-8.0-8.0.28-1.el9_8, aspnetcore-targeting-pack-8.0-8.0.28-1.el9_8 +9
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) dotnet-sdk-8.0-source-built-artifacts-8.0.128-1.el9_8
  • RHSA-2026:25113 Released 2026-06-10 · Red Hat rating Important
    .NET 9.0 security update
    • Red Hat Enterprise Linux AppStream (v. 8) aspnetcore-runtime-9.0-9.0.17-1.el8_10, aspnetcore-runtime-dbg-9.0-9.0.17-1.el8_10, aspnetcore-targeting-pack-9.0-9.0.17-1.el8_10 +11
    • Red Hat Enterprise Linux CRB (v. 8) dotnet-sdk-9.0-source-built-artifacts-9.0.118-1.el8_10
  • RHSA-2026:25110 Released 2026-06-10 · Red Hat rating Important
    .NET 8.0 security update
    • Red Hat Enterprise Linux AppStream (v. 8) aspnetcore-runtime-8.0-8.0.28-1.el8_10, aspnetcore-runtime-dbg-8.0-8.0.28-1.el8_10, aspnetcore-targeting-pack-8.0-8.0.28-1.el8_10 +9
    • Red Hat Enterprise Linux CRB (v. 8) dotnet-sdk-8.0-source-built-artifacts-8.0.128-1.el8_10
  • RHSA-2026:25114 Released 2026-06-10 · Red Hat rating Important
    .NET 10.0 security update
    • Red Hat Enterprise Linux AppStream (v. 8) aspnetcore-runtime-10.0-10.0.9-1.el8_10, aspnetcore-runtime-dbg-10.0-10.0.9-1.el8_10, aspnetcore-targeting-pack-10.0-10.0.9-1.el8_10 +12
    • Red Hat Enterprise Linux CRB (v. 8) dotnet-sdk-10.0-source-built-artifacts-10.0.109-1.el8_10
  • RHSA-2026:25115 Released 2026-06-10 · Red Hat rating Important
    .NET 10.0 security update
    • Red Hat Enterprise Linux AppStream (v. 10) aspnetcore-runtime-10.0-10.0.9-1.el10_2, aspnetcore-runtime-dbg-10.0-10.0.9-1.el10_2, aspnetcore-targeting-pack-10.0-10.0.9-1.el10_2 +11
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) dotnet-sdk-10.0-source-built-artifacts-10.0.109-1.el10_2
  • RHSA-2026:25112 Released 2026-06-10 · Red Hat rating Important
    .NET 9.0 security update
    • Red Hat Enterprise Linux AppStream (v. 10) aspnetcore-runtime-9.0-9.0.17-1.el10_2, aspnetcore-runtime-dbg-9.0-9.0.17-1.el10_2, aspnetcore-targeting-pack-9.0-9.0.17-1.el10_2 +11
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) dotnet-sdk-9.0-source-built-artifacts-9.0.118-1.el10_2
  • RHSA-2026:25111 Released 2026-06-10 · Red Hat rating Important
    .NET 8.0 security update
    • Red Hat Enterprise Linux AppStream (v. 10) aspnetcore-runtime-8.0-8.0.28-1.el10_2, aspnetcore-runtime-dbg-8.0-8.0.28-1.el10_2, aspnetcore-targeting-pack-8.0-8.0.28-1.el10_2 +9
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) dotnet-sdk-8.0-source-built-artifacts-8.0.128-1.el10_2
  • RHSA-2026:17527 Released 2026-05-14 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images dotnet9.0-9.0.117-1.hum1@src

Microsoft 3 updates

  • KB5097150
    Security Update
    • .NET 9.0 installed on Linux 9.0.17
    • .NET 9.0 installed on Mac OS 9.0.17
    • .NET 9.0 installed on Windows 9.0.17
    • ASP.NET Core 9.0 9.0.17
  • KB5097149
    Security Update
    • .NET 8.0 8.0.28
    • .NET 8.0 installed on Linux 8.0.28
    • .NET 8.0 installed on Mac OS 8.0.28
    • .NET 8.0 installed on Windows 8.0.28
    • ASP.NET Core 8.0 8.0.28
  • KB5097148
    Security Update
    • .NET 10.0 installed on Linux 10.0.9
    • .NET 10.0 installed on Mac OS 10.0.9
    • .NET 10.0 installed on Windows 10.0.9
    • ASP.NET Core 10.0 10.0.9

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat CodeReady Linux Builder EUS (v.9.6)Fixed RHSA-2026:28011, RHSA-2026:28051
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:25111, RHSA-2026:25112, RHSA-2026:25115
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:25110, RHSA-2026:25113, RHSA-2026:25114
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:25220, RHSA-2026:25221, RHSA-2026:25222
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:28227
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:28007, RHSA-2026:28009
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:28011, RHSA-2026:28051
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:25110, RHSA-2026:25113, RHSA-2026:25114
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:25111, RHSA-2026:25112, RHSA-2026:25115
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:25220, RHSA-2026:25221, RHSA-2026:25222
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:28007, RHSA-2026:28009
Red Hat Hardened ImagesFixed RHSA-2026:17527, RHSA-2026:26638, RHSA-2026:26994
Not affected: 1 product
  • Red Hat Hardened Images

Microsoft

Microsoft's page for this CVE →

Impact
Tampering
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Unlikely

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-45491
  2. 2026-10-03 Alias added: GHSA-7q4v-2mr6-5gpx

References

Patch 1

Advisory 1

Other 3

  • TI-2026-79288 Out-of-bounds write in Google Brotli decoder KEVCVSS 4.0CRITICAL 9.2
  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2023-19596 .NET and Visual Studio Denial of Service Vulnerability KEVCVSS 3.1HIGH 7.5
  • TI-2023-19588 Microsoft QUIC Denial of Service Vulnerability CVSS 3.1HIGH 7.5
  • TI-2024-14152 .NET and Visual Studio Denial of Service Vulnerability CVSS 3.1HIGH 7.5
  • TI-2021-08380 .NET Core Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
See all 129 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences