Read the docs
TI-2023-17726 Aliases CVE-2023-35391GHSA-j8rm-cm55-qqj6

ASP.NET Core SignalR and Visual Studio Information Disclosure Vulnerability

Priority LOW 37CWE-200Published · Updated

Key facts

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

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

Summary

ASP.NET Core SignalR and Visual Studio Information Disclosure Vulnerability

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01904 79th percentileScored 2026-11-07
Fix Fixed Microsoft.AspNetCore.SignalR.StackExchangeRedis (NuGet): 7.0.10, 6.0.21Microsoft.AspNetCore.SignalR.Redis (NuGet): 1.0.40Microsoft: 2 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 6.06.0.0 to before 6.0.216.0.21Patch availableCNA
Microsoft.NET 7.07.0.0 to before 7.0.107.0.10Patch availableCNA
MicrosoftASP.NET Core 2.12.0 to before 2.1.402.1.40Patch availableCNA
MicrosoftMicrosoft Visual Studio 2022 version 17.217.2.0 to before 17.2.1817.2.18Patch availableCNA
MicrosoftMicrosoft Visual Studio 2022 version 17.417.4.0 to before 17.4.1017.4.10Patch availableCNA
MicrosoftMicrosoft Visual Studio 2022 version 17.617.6.0 to before 17.6.617.6.6Patch availableCNA
—Microsoft.AspNetCore.SignalR.StackExchangeRedis (NuGet)7.0.0 to before 7.0.107.0.10Patch availableGHSA-j8rm-cm55-qqj6
—Microsoft.AspNetCore.SignalR.StackExchangeRedis (NuGet)6.0.0 to before 6.0.216.0.21Patch availableGHSA-j8rm-cm55-qqj6
—Microsoft.AspNetCore.SignalR.Redis (NuGet)before 1.0.401.0.40Patch availableGHSA-j8rm-cm55-qqj6
  • .NET 6.0 VendorMicrosoft Affected 6.0.0 to before 6.0.21 Fixed in 6.0.21 Patch available CNA
  • .NET 7.0 VendorMicrosoft Affected 7.0.0 to before 7.0.10 Fixed in 7.0.10 Patch available CNA
  • ASP.NET Core 2.1 VendorMicrosoft Affected 2.0 to before 2.1.40 Fixed in 2.1.40 Patch available CNA
  • Microsoft Visual Studio 2022 version 17.2 VendorMicrosoft Affected 17.2.0 to before 17.2.18 Fixed in 17.2.18 Patch available CNA
  • Microsoft Visual Studio 2022 version 17.4 VendorMicrosoft Affected 17.4.0 to before 17.4.10 Fixed in 17.4.10 Patch available CNA
  • Microsoft Visual Studio 2022 version 17.6 VendorMicrosoft Affected 17.6.0 to before 17.6.6 Fixed in 17.6.6 Patch available CNA
  • Microsoft.AspNetCore.SignalR.StackExchangeRedis (NuGet) Vendor— Affected 7.0.0 to before 7.0.10 Fixed in 7.0.10 Patch available GHSA-j8rm-cm55-qqj6
  • Microsoft.AspNetCore.SignalR.StackExchangeRedis (NuGet) Vendor— Affected 6.0.0 to before 6.0.21 Fixed in 6.0.21 Patch available GHSA-j8rm-cm55-qqj6
  • Microsoft.AspNetCore.SignalR.Redis (NuGet) Vendor— Affected before 1.0.40 Fixed in 1.0.40 Patch available GHSA-j8rm-cm55-qqj6

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*6.0.0 to before 6.0.21; 7.0.0 to before 7.0.10VulnerableMicrosoft
cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:*2.1 to before 2.1.40VulnerableMicrosoft
cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*17.2.0 to before 17.2.18; 17.4.0 to before 17.4.10; 17.6.0 to before 17.6.6VulnerableMicrosoft
  • cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* Versions 6.0.0 to before 6.0.21; 7.0.0 to before 7.0.10 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:* Versions 2.1 to before 2.1.40 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:* Versions 17.2.0 to before 17.2.18; 17.4.0 to before 17.4.10; 17.6.0 to before 17.6.6 Vulnerable ·Microsoft

Remediation

  • Fix · GHSA-j8rm-cm55-qqj6 Microsoft.AspNetCore.SignalR.StackExchangeRedis (NuGet) Fixed in 7.0.10 Advisory →
  • Fix · GHSA-j8rm-cm55-qqj6 Microsoft.AspNetCore.SignalR.StackExchangeRedis (NuGet) Fixed in 6.0.21 Advisory →
  • Fix · GHSA-j8rm-cm55-qqj6 Microsoft.AspNetCore.SignalR.Redis (NuGet) Fixed in 1.0.40 Advisory →

Microsoft 2 updates

Vendor assessments

Red Hat

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

Not affected: 3 products
  • .NET 6.0 on Red Hat Enterprise Linux
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Microsoft

Microsoft's page for this CVE →

Impact
Information Disclosure
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely
ProductStatusPlan or fix
ASP.NET Core 2.1Fixed 2.1.40 · Security Update
Microsoft Visual Studio 2022 version 17.2Fixed 17.2.18 · Security Update
Microsoft Visual Studio 2022 version 17.4Fixed 17.4.10 · Security Update
Microsoft Visual Studio 2022 version 17.6Fixed 17.6.6 · Security Update

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-35391
  2. 2026-10-03 Alias added: GHSA-j8rm-cm55-qqj6

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