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TI-2026-72257 Aliases CVE-2026-70179GHSA-vrrp-6v32-2p8g

ASP.NET Core Elevation of Privilege Vulnerability

Priority LOW 36CWE-290Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-290.

Summary

CVE-2026-70179 (GHSA-vrrp-6v32-2p8g), published 2026-10-13, is an authentication bypass by spoofing (CWE-290) in ASP.NET Core. Microsoft rates it HIGH with a CVSS 3.1 base score of 7.5, and an authorized attacker can exploit it over a network for privilege escalation. CISA's SSVC data lists exploitation as none and automatable as no, and the vulnerability is not in CISA's KEV catalog. The affected products are the Microsoft.AspNetCore.Authentication.Negotiate NuGet package from 8.0.0 before 8.0.32, from 9.0.0 before 9.0.21 and from 10.0.0 before 10.0.13, plus Visual Studio 2022 version 17.14 before 17.14.42 and Visual Studio 2026 version 18.10 before 18.10.4.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Authentication bypass by spoofing in ASP.NET Core allows an authorized attacker to elevate privileges over a network.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00629 50th percentileScored 2026-11-07
Fix Fixed Microsoft Visual Studio 2022 version 17.14 (Microsoft): 17.14.42Microsoft Visual Studio 2026 version 18.10 (Microsoft): 18.10.4+2 more productsRed Hat: 14 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftMicrosoft Visual Studio 2022 version 17.1417.14.0 to before 17.14.4217.14.42Patch availableCNA
MicrosoftMicrosoft Visual Studio 2026 version 18.1018.10.0 to before 18.10.418.10.4Patch availableCNA
MicrosoftMicrosoft.AspNetCore.Authentication.Negotiate10.0.0 to before 10.0.1310.0.13Patch availableCNA
—Microsoft.AspNetCore.Authentication.Negotiate (NuGet)10.0.0 to before 10.0.1310.0.13Patch availableGHSA-vrrp-6v32-2p8g
—Microsoft.AspNetCore.Authentication.Negotiate (NuGet)8.0.0 to before 8.0.328.0.32Patch availableGHSA-vrrp-6v32-2p8g
—Microsoft.AspNetCore.Authentication.Negotiate (NuGet)9.0.0 to before 9.0.219.0.21Patch availableGHSA-vrrp-6v32-2p8g
  • Microsoft Visual Studio 2022 version 17.14 VendorMicrosoft Affected 17.14.0 to before 17.14.42 Fixed in 17.14.42 Patch available CNA
  • Microsoft Visual Studio 2026 version 18.10 VendorMicrosoft Affected 18.10.0 to before 18.10.4 Fixed in 18.10.4 Patch available CNA
  • Microsoft.AspNetCore.Authentication.Negotiate VendorMicrosoft Affected 10.0.0 to before 10.0.13 Fixed in 10.0.13 Patch available CNA
  • Microsoft.AspNetCore.Authentication.Negotiate (NuGet) Vendor— Affected 10.0.0 to before 10.0.13 Fixed in 10.0.13 Patch available GHSA-vrrp-6v32-2p8g
  • Microsoft.AspNetCore.Authentication.Negotiate (NuGet) Vendor— Affected 8.0.0 to before 8.0.32 Fixed in 8.0.32 Patch available GHSA-vrrp-6v32-2p8g
  • Microsoft.AspNetCore.Authentication.Negotiate (NuGet) Vendor— Affected 9.0.0 to before 9.0.21 Fixed in 9.0.21 Patch available GHSA-vrrp-6v32-2p8g

Remediation

Update the Negotiate package to 8.0.32, 9.0.21 or 10.0.13, matching your .NET version, and update Visual Studio 2022 to 17.14.42 or Visual Studio 2026 to 18.10.4. Red Hat has published .NET security updates for its platforms, including RHSA-2026:88422 for .NET 8.0 on Red Hat Enterprise Linux 9.6.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA Microsoft Visual Studio 2022 version 17.14 (Microsoft) Fixed in 17.14.42
  • Fix · CNA Microsoft Visual Studio 2026 version 18.10 (Microsoft) Fixed in 18.10.4
  • Fix · CNA Microsoft.AspNetCore.Authentication.Negotiate (Microsoft) Fixed in 10.0.13
  • Fix · GHSA-vrrp-6v32-2p8g Microsoft.AspNetCore.Authentication.Negotiate (NuGet) Fixed in 10.0.13 Advisory →
  • Fix · GHSA-vrrp-6v32-2p8g Microsoft.AspNetCore.Authentication.Negotiate (NuGet) Fixed in 8.0.32 Advisory →
  • Fix · GHSA-vrrp-6v32-2p8g Microsoft.AspNetCore.Authentication.Negotiate (NuGet) Fixed in 9.0.21 Advisory →

Red Hat 14 advisories

  • RHSA-2026:89735 Released 2026-10-27 · Red Hat rating Critical
    .NET 9.0 security update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) dotnet-sdk-9.0-source-built-artifacts-9.0.122-1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) aspnetcore-runtime-9.0-9.0.21-1.el9_6, aspnetcore-runtime-dbg-9.0-9.0.21-1.el9_6, aspnetcore-targeting-pack-9.0-9.0.21-1.el9_6 +12
  • RHSA-2026:88474 Released 2026-10-22 · Red Hat rating Critical
    .NET 8.0 security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) aspnetcore-runtime-8.0-8.0.32-1.el10_0, aspnetcore-runtime-dbg-8.0-8.0.32-1.el10_0, aspnetcore-targeting-pack-8.0-8.0.32-1.el10_0 +9
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) dotnet-sdk-8.0-source-built-artifacts-8.0.132-1.el10_0
  • RHSA-2026:88422 Released 2026-10-22 · Red Hat rating Critical
    .NET 8.0 security update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) dotnet-sdk-8.0-source-built-artifacts-8.0.132-1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) aspnetcore-runtime-8.0-8.0.32-1.el9_6, aspnetcore-runtime-dbg-8.0-8.0.32-1.el9_6, aspnetcore-targeting-pack-8.0-8.0.32-1.el9_6 +9
Show 11 more Red Hat advisories
  • RHSA-2026:88425 Released 2026-10-22 · Red Hat rating Critical
    .NET 8.0 security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) aspnetcore-runtime-8.0-8.0.32-1.el9_4, aspnetcore-runtime-dbg-8.0-8.0.32-1.el9_4, aspnetcore-targeting-pack-8.0-8.0.32-1.el9_4 +11
  • RHSA-2026:88424 Released 2026-10-22 · Red Hat rating Critical
    .NET 9.0 security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) aspnetcore-runtime-9.0-9.0.21-1.el10_0, aspnetcore-runtime-dbg-9.0-9.0.21-1.el10_0, aspnetcore-targeting-pack-9.0-9.0.21-1.el10_0 +12
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) dotnet-sdk-9.0-source-built-artifacts-9.0.122-1.el10_0
  • RHSA-2026:86594 Released 2026-10-21 · Red Hat rating Critical
    .NET 8.0 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 8) aspnetcore-runtime-8.0-8.0.32-2.el8_10, aspnetcore-runtime-dbg-8.0-8.0.32-2.el8_10, aspnetcore-targeting-pack-8.0-8.0.32-2.el8_10 +9
    • Red Hat Enterprise Linux CRB (v. 8) dotnet-sdk-8.0-source-built-artifacts-8.0.132-2.el8_10
  • RHSA-2026:86193 Released 2026-10-20 · Red Hat rating Critical
    .NET 10.0 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) aspnetcore-runtime-10.0-10.0.13-1.el9_8, aspnetcore-runtime-dbg-10.0-10.0.13-1.el9_8, aspnetcore-targeting-pack-10.0-10.0.13-1.el9_8 +11
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) dotnet-sdk-10.0-source-built-artifacts-10.0.113-1.el9_8
  • RHSA-2026:86171 Released 2026-10-20 · Red Hat rating Critical
    .NET 9.0 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) aspnetcore-runtime-9.0-9.0.21-1.el9_8, aspnetcore-runtime-dbg-9.0-9.0.21-1.el9_8, aspnetcore-targeting-pack-9.0-9.0.21-1.el9_8 +11
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) dotnet-sdk-9.0-source-built-artifacts-9.0.122-1.el9_8
  • RHSA-2026:86169 Released 2026-10-20 · Red Hat rating Critical
    .NET 8.0 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) aspnetcore-runtime-8.0-8.0.32-1.el9_8, aspnetcore-runtime-dbg-8.0-8.0.32-1.el9_8, aspnetcore-targeting-pack-8.0-8.0.32-1.el9_8 +9
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) dotnet-sdk-8.0-source-built-artifacts-8.0.132-1.el9_8
  • RHSA-2026:86192 Released 2026-10-20 · Red Hat rating Critical
    .NET 10.0 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 8) aspnetcore-runtime-10.0-10.0.13-1.el8_10, aspnetcore-runtime-dbg-10.0-10.0.13-1.el8_10, aspnetcore-targeting-pack-10.0-10.0.13-1.el8_10 +11
    • Red Hat Enterprise Linux CRB (v. 8) dotnet-sdk-10.0-source-built-artifacts-10.0.113-1.el8_10
  • RHSA-2026:86170 Released 2026-10-20 · Red Hat rating Critical
    .NET 9.0 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 8) aspnetcore-runtime-9.0-9.0.21-1.el8_10, aspnetcore-runtime-dbg-9.0-9.0.21-1.el8_10, aspnetcore-targeting-pack-9.0-9.0.21-1.el8_10 +11
    • Red Hat Enterprise Linux CRB (v. 8) dotnet-sdk-9.0-source-built-artifacts-9.0.122-1.el8_10
  • RHSA-2026:86172 Released 2026-10-20 · Red Hat rating Critical
    .NET 9.0 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 10) aspnetcore-runtime-9.0-9.0.21-1.el10_2, aspnetcore-runtime-dbg-9.0-9.0.21-1.el10_2, aspnetcore-targeting-pack-9.0-9.0.21-1.el10_2 +11
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) dotnet-sdk-9.0-source-built-artifacts-9.0.122-1.el10_2
  • RHSA-2026:86195 Released 2026-10-20 · Red Hat rating Critical
    .NET 10.0 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 10) aspnetcore-runtime-10.0-10.0.13-1.el10_2, aspnetcore-runtime-dbg-10.0-10.0.13-1.el10_2, aspnetcore-targeting-pack-10.0-10.0.13-1.el10_2 +11
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) dotnet-sdk-10.0-source-built-artifacts-10.0.113-1.el10_2
  • RHSA-2026:86168 Released 2026-10-20 · Red Hat rating Critical
    .NET 8.0 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 10) aspnetcore-runtime-8.0-8.0.32-1.el10_2, aspnetcore-runtime-dbg-8.0-8.0.32-1.el10_2, aspnetcore-targeting-pack-8.0-8.0.32-1.el10_2 +9
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) dotnet-sdk-8.0-source-built-artifacts-8.0.132-1.el10_2

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat CodeReady Linux Builder EUS (v.9.6)Fixed RHSA-2026:88422, RHSA-2026:89735
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:86168, RHSA-2026:86172, RHSA-2026:86195
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:86170, RHSA-2026:86192, RHSA-2026:86594
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:86169, RHSA-2026:86171, RHSA-2026:86193
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:88425
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:88424, RHSA-2026:88474
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:88422, RHSA-2026:89735
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:86170, RHSA-2026:86192, RHSA-2026:86594
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:86168, RHSA-2026:86172, RHSA-2026:86195
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:86169, RHSA-2026:86171, RHSA-2026:86193
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:88424, RHSA-2026:88474
Not affected: 1 product
  • Red Hat Hardened Images

Timeline

  1. 2026-10-13 Threatist record created from CVE-2026-70179
  2. 2026-10-13 Alias added: GHSA-vrrp-6v32-2p8g
  3. 2026-10-13 Fix available: NuGet/[email protected], NuGet/[email protected], NuGet/[email protected] · GHSA-vrrp-6v32-2p8g
  4. 2026-10-13 CVSS score added · GHSA-vrrp-6v32-2p8g
  5. 2026-10-13 Weakness changed · GHSA-vrrp-6v32-2p8g
  6. 2026-10-13 4 new references · GHSA-vrrp-6v32-2p8g
  7. 2026-10-13 CISA SSVC decision points changed
  8. 2026-10-14 Priority changed: MEDIUM → LOW
  9. 2026-10-14 CISA SSVC decision points changed
  10. 2026-10-16 Affected versions changed · Red Hat
  11. 2026-10-16 CVSS score added · Red Hat
  12. 2026-10-20 2 new references · GHSA-vrrp-6v32-2p8g
  13. 2026-10-21 Fix available: RHSA-2026:86168 · Red Hat
  14. 2026-10-21 Fix available: RHSA-2026:86169 · Red Hat
  15. 2026-10-21 Fix available: RHSA-2026:86170 · Red Hat
  16. 2026-10-21 Fix available: RHSA-2026:86171 · Red Hat
  17. 2026-10-21 Fix available: RHSA-2026:86192 · Red Hat
  18. 2026-10-21 Fix available: RHSA-2026:86193 · Red Hat
  19. 2026-10-21 Fix available: RHSA-2026:86172 · Red Hat
  20. 2026-10-21 Fix available: RHSA-2026:86195 · Red Hat
  21. 2026-10-21 Fix available: RHSA-2026:86594 · Red Hat
  22. 2026-10-21 Fix available: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux AppStream (v. 9) +3 · Red Hat
  23. 2026-10-23 Fix available: RHSA-2026:88422 · Red Hat
  24. 2026-10-23 Fix available: RHSA-2026:88424 · Red Hat
  25. 2026-10-23 Fix available: RHSA-2026:88474 · Red Hat
  26. 2026-10-23 Fix available: RHSA-2026:88425 · Red Hat
  27. 2026-10-23 Fix available: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream E4S (v.9.4), Red Hat Enterprise Linux AppStream EUS (v. 10.0) +2 · Red Hat
  28. 2026-10-28 EPSS moved to the 50th–90th percentile
  29. 2026-10-29 Affected versions changed · Red Hat
  30. 2026-10-29 Fix available: RHSA-2026:89735 · Red Hat

References

Patch 1

Advisory 1

Other 4

  • TI-2026-42212 Microsoft SharePoint Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-37256 Microsoft SharePoint Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-26194 Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-16982 Microsoft SharePoint Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-36863 Windows Server Update Service (WSUS) Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-33671 Microsoft SharePoint Server Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
See all 18045 →

Sources

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