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TI-2026-73133 Aliases CVE-2026-96959GHSA-c399-9853-6jmj

Unbounded allocation in .NET lets attackers deny service

Priority MEDIUM 41CWE-770Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-770.

Summary

Microsoft .NET Framework and the System.Security.Cryptography.Xml NuGet package allocate resources without limits or throttling (CWE-770). An unauthenticated remote attacker can exhaust resources over the network and deny service. CISA has not listed the flaw in KEV, and the references include no exploit link.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

Description from the CNA

Allocation of resources without limits or throttling in .NET allows an unauthorized attacker to deny service over a network.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00969 62nd percentileScored 2026-11-07
Fix Fixed Microsoft .NET Framework 3.5 (Microsoft): 2.0.50727.9188 AND 3.0.30729.9171Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 (Microsoft): 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0+8 more productsRed Hat: 15 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
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
MicrosoftMicrosoft .NET Framework 3.53.5.0 to before 2.0.50727.9188 AND 3.0.30729.91712.0.50727.9188 AND 3.0.30729.9171Patch availableCNA
MicrosoftMicrosoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.23.0.0.0 to before 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.02.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0Patch availableCNA
MicrosoftMicrosoft .NET Framework 3.5 AND 4.7.24.7.0 to before 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.02.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0Patch availableCNA
MicrosoftMicrosoft .NET Framework 3.5 AND 4.84.8.0 to before 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.02.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0Patch availableCNA
MicrosoftMicrosoft .NET Framework 3.5 AND 4.8.14.8.1 to before 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.02.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0Patch availableCNA
MicrosoftMicrosoft .NET Framework 4.6.2/4.7/4.7.1/4.7.24.7.0 to before 4.7.4150.04.7.4150.0Patch availableCNA
MicrosoftMicrosoft .NET Framework 4.84.8.0 to before 4.8.4811.04.8.4811.0Patch availableCNA
MicrosoftMicrosoft .NET Framework 4.8.14.8.0.0 to before 4.8.9363.04.8.9363.0Patch availableCNA
MicrosoftSystem.Security.Cryptography.Xml10.0.0 to before 10.0.1310.0.13Patch availableCNA
—System.Security.Cryptography.Xml (NuGet)10.0.0 to before 10.0.1310.0.13Patch availableGHSA-c399-9853-6jmj
—System.Security.Cryptography.Xml (NuGet)11.0.0-preview.1 to before 11.0.0-rc.211.0.0-rc.2Patch availableGHSA-c399-9853-6jmj
—System.Security.Cryptography.Xml (NuGet)8.0.0 to before 8.0.58.0.5Patch availableGHSA-c399-9853-6jmj
—System.Security.Cryptography.Xml (NuGet)9.0.0 to before 9.0.219.0.21Patch availableGHSA-c399-9853-6jmj
  • Microsoft .NET Framework 3.5 VendorMicrosoft Affected 3.5.0 to before 2.0.50727.9188 AND 3.0.30729.9171 Fixed in 2.0.50727.9188 AND 3.0.30729.9171 Patch available CNA
  • Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 VendorMicrosoft Affected 3.0.0.0 to before 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0 Fixed in 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0 Patch available CNA
  • Microsoft .NET Framework 3.5 AND 4.7.2 VendorMicrosoft Affected 4.7.0 to before 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0 Fixed in 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0 Patch available CNA
  • Microsoft .NET Framework 3.5 AND 4.8 VendorMicrosoft Affected 4.8.0 to before 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0 Fixed in 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0 Patch available CNA
  • Microsoft .NET Framework 3.5 AND 4.8.1 VendorMicrosoft Affected 4.8.1 to before 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 Fixed in 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 Patch available CNA
  • Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 VendorMicrosoft Affected 4.7.0 to before 4.7.4150.0 Fixed in 4.7.4150.0 Patch available CNA
  • Microsoft .NET Framework 4.8 VendorMicrosoft Affected 4.8.0 to before 4.8.4811.0 Fixed in 4.8.4811.0 Patch available CNA
  • Microsoft .NET Framework 4.8.1 VendorMicrosoft Affected 4.8.0.0 to before 4.8.9363.0 Fixed in 4.8.9363.0 Patch available CNA
  • System.Security.Cryptography.Xml VendorMicrosoft Affected 10.0.0 to before 10.0.13 Fixed in 10.0.13 Patch available CNA
  • System.Security.Cryptography.Xml (NuGet) Vendor— Affected 10.0.0 to before 10.0.13 Fixed in 10.0.13 Patch available GHSA-c399-9853-6jmj
  • System.Security.Cryptography.Xml (NuGet) Vendor— Affected 11.0.0-preview.1 to before 11.0.0-rc.2 Fixed in 11.0.0-rc.2 Patch available GHSA-c399-9853-6jmj
  • System.Security.Cryptography.Xml (NuGet) Vendor— Affected 8.0.0 to before 8.0.5 Fixed in 8.0.5 Patch available GHSA-c399-9853-6jmj
  • System.Security.Cryptography.Xml (NuGet) Vendor— Affected 9.0.0 to before 9.0.21 Fixed in 9.0.21 Patch available GHSA-c399-9853-6jmj

CPE configurations NVD · 34

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*8.0.0 to before 8.0.5; 9.0.0 to before 9.0.21; 10.0.0 to before 10.0.13VulnerableMicrosoft
cpe:2.3:a:microsoft:.net:11.0.0:preview1:*:*:*:*:*:*11.0.0 preview1VulnerableMicrosoft
cpe:2.3:a:microsoft:.net:11.0.0:preview2:*:*:*:*:*:*11.0.0 preview2VulnerableMicrosoft
cpe:2.3:a:microsoft:.net:11.0.0:preview3:*:*:*:*:*:*11.0.0 preview3VulnerableMicrosoft
cpe:2.3:a:microsoft:.net:11.0.0:preview4:*:*:*:*:*:*11.0.0 preview4VulnerableMicrosoft
cpe:2.3:a:microsoft:.net:11.0.0:preview5:*:*:*:*:*:*11.0.0 preview5VulnerableMicrosoft
cpe:2.3:a:microsoft:.net:11.0.0:preview6:*:*:*:*:*:*11.0.0 preview6VulnerableMicrosoft
cpe:2.3:a:microsoft:.net:11.0.0:preview7:*:*:*:*:*:*11.0.0 preview7VulnerableMicrosoft
cpe:2.3:a:microsoft:.net:11.0.0:rc1:*:*:*:*:*:*11.0.0 rc1VulnerableMicrosoft
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*not specified by NVDRunning onApple
  • cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* Versions 8.0.0 to before 8.0.5; 9.0.0 to before 9.0.21; 10.0.0 to before 10.0.13 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:.net:11.0.0:preview1:*:*:*:*:*:* Versions 11.0.0 preview1 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:.net:11.0.0:preview2:*:*:*:*:*:* Versions 11.0.0 preview2 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:.net:11.0.0:preview3:*:*:*:*:*:* Versions 11.0.0 preview3 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:.net:11.0.0:preview4:*:*:*:*:*:* Versions 11.0.0 preview4 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:.net:11.0.0:preview5:*:*:*:*:*:* Versions 11.0.0 preview5 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:.net:11.0.0:preview6:*:*:*:*:*:* Versions 11.0.0 preview6 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:.net:11.0.0:preview7:*:*:*:*:*:* Versions 11.0.0 preview7 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:.net:11.0.0:rc1:*:*:*:*:*:* Versions 11.0.0 rc1 Vulnerable ·Microsoft
  • cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Apple
Show 24 more CPE
CPEVersionsRoleVendor
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_framework:4.8.1:*:*:*:*:*:*:*4.8.1VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_11_26h1:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
cpe:2.3:a:microsoft:.net_framework:4.8:*:*:*:*:*:*:*4.8VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*r2Running onMicrosoft
cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
cpe:2.3:a:microsoft:.net_framework:4.6.2:*:*:*:*:*:*:*4.6.2VulnerableMicrosoft
cpe:2.3:a:microsoft:.net_framework:4.7:*:*:*:*:*:*:*4.7VulnerableMicrosoft
cpe:2.3:a:microsoft:.net_framework:4.7.1:*:*:*:*:*:*:*4.7.1VulnerableMicrosoft
cpe:2.3:a:microsoft:.net_framework:4.7.2:*:*:*:*:*:*:*4.7.2VulnerableMicrosoft
cpe:2.3:a:microsoft:.net_framework:3.5:*:*:*:*:*:*:*3.5VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_21h2:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
cpe:2.3:o:microsoft:windows_10_22h2:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
cpe:2.3:o:microsoft:windows_11_23h2:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
cpe:2.3:o:microsoft:windows_11_24h2:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
cpe:2.3:o:microsoft:windows_11_25h2:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
cpe:2.3:o:microsoft:windows_11_26h2:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
cpe:2.3:o:microsoft:windows_server_2022:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
cpe:2.3:o:microsoft:windows_server_2025:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
  • 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
  • cpe:2.3:a:microsoft:.net_framework:4.8.1:*:*:*:*:*:*:* Versions 4.8.1 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_11_26h1:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
  • cpe:2.3:a:microsoft:.net_framework:4.8:*:*:*:*:*:*:* Versions 4.8 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* Versions r2 Running on ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
  • cpe:2.3:a:microsoft:.net_framework:4.6.2:*:*:*:*:*:*:* Versions 4.6.2 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:.net_framework:4.7:*:*:*:*:*:*:* Versions 4.7 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:.net_framework:4.7.1:*:*:*:*:*:*:* Versions 4.7.1 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:.net_framework:4.7.2:*:*:*:*:*:*:* Versions 4.7.2 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:.net_framework:3.5:*:*:*:*:*:*:* Versions 3.5 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_21h2:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_22h2:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
  • cpe:2.3:o:microsoft:windows_11_23h2:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
  • cpe:2.3:o:microsoft:windows_11_24h2:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
  • cpe:2.3:o:microsoft:windows_11_25h2:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
  • cpe:2.3:o:microsoft:windows_11_26h2:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2022:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2025:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

Install the fixed .NET Framework build for each branch: 2.0.50727.9188 and 3.0.30729.9171 for 3.5 (with 4.8.1 also 4.8.9363.0), 2.0.50727.9073, 3.0.30729.9070 and 4.8.4811.0 for 3.5 with 4.8, 2.0.50727.8987, 3.0.30729.8982 and 4.7.4150.0 for 3.5 with 4.6.2/4.7/4.7.1/4.7.2, 4.7.4150.0 for 4.6.2/4.7/4.7.1/4.7.2, 4.8.4811.0 for 4.8, and 4.8.9363.0 for 4.8.1. Update System.Security.Cryptography.Xml to 8.0.5, 9.0.21, 10.0.13 or 11.0.0-rc.2 for its branch. Red Hat advisories include RHSA-2026:84491, RHSA-2026:86169 and RHSA-2026:88422.

Written with Claude Haiku 5.5 from the sources below · 2026-11-05

  • Fix · CNA Microsoft .NET Framework 3.5 (Microsoft) Fixed in 2.0.50727.9188 AND 3.0.30729.9171
  • Fix · CNA Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 (Microsoft) Fixed in 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0
  • Fix · CNA Microsoft .NET Framework 3.5 AND 4.7.2 (Microsoft) Fixed in 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0
  • Fix · CNA Microsoft .NET Framework 3.5 AND 4.8 (Microsoft) Fixed in 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0
  • Fix · CNA Microsoft .NET Framework 3.5 AND 4.8.1 (Microsoft) Fixed in 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0
  • Fix · CNA Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 (Microsoft) Fixed in 4.7.4150.0
  • Fix · CNA Microsoft .NET Framework 4.8 (Microsoft) Fixed in 4.8.4811.0
  • Fix · CNA Microsoft .NET Framework 4.8.1 (Microsoft) Fixed in 4.8.9363.0
  • Fix · CNA System.Security.Cryptography.Xml (Microsoft) Fixed in 10.0.13
  • Fix · GHSA-c399-9853-6jmj System.Security.Cryptography.Xml (NuGet) Fixed in 10.0.13 Advisory →
  • Fix · GHSA-c399-9853-6jmj System.Security.Cryptography.Xml (NuGet) Fixed in 11.0.0-rc.2 Advisory →
  • Fix · GHSA-c399-9853-6jmj System.Security.Cryptography.Xml (NuGet) Fixed in 8.0.5 Advisory →
  • Fix · GHSA-c399-9853-6jmj System.Security.Cryptography.Xml (NuGet) Fixed in 9.0.21 Advisory →

Red Hat 15 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 12 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
  • RHSA-2026:84491 Released 2026-10-18 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images dotnet-sdk-10.0-10.0.113-1.hum1@aarch64, dotnet-sdk-10.0-10.0.113-1.hum1@s390x, dotnet-sdk-10.0-10.0.113-1.hum1@x86_64 +12

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
Red Hat Hardened ImagesFixed RHSA-2026:84491
Not affected: 1 product
  • Red Hat Hardened Images

Timeline

  1. 2026-10-13 Threatist record created from CVE-2026-96959
  2. 2026-10-13 Alias added: GHSA-c399-9853-6jmj
  3. 2026-10-13 Fix available: NuGet/[email protected], NuGet/[email protected], NuGet/[email protected] +1 · GHSA-c399-9853-6jmj
  4. 2026-10-13 CVSS score added · GHSA-c399-9853-6jmj
  5. 2026-10-13 Weakness changed · GHSA-c399-9853-6jmj
  6. 2026-10-13 4 new references · GHSA-c399-9853-6jmj
  7. 2026-10-14 Priority changed: LOW → MEDIUM
  8. 2026-10-20 2 new references · GHSA-c399-9853-6jmj
  9. 2026-10-23 Affected versions changed · Red Hat
  10. 2026-10-23 CVSS score added · Red Hat
  11. 2026-10-24 Affected versions changed · Red Hat
  12. 2026-10-29 Fix available: RHSA-2026:84491 · Red Hat
  13. 2026-10-29 Fix available: Red Hat Hardened Images · Red Hat
  14. 2026-10-30 Fix available: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux AppStream (v. 8) +8 · Red Hat
  15. 2026-11-03 Fix available: RHSA-2026:86168 · Red Hat
  16. 2026-11-03 Fix available: RHSA-2026:86170 · Red Hat
  17. 2026-11-03 Fix available: RHSA-2026:86169 · Red Hat
  18. 2026-11-03 Fix available: RHSA-2026:86171 · Red Hat
  19. 2026-11-03 Fix available: RHSA-2026:86594 · Red Hat
  20. 2026-11-03 Fix available: RHSA-2026:86172 · Red Hat
  21. 2026-11-03 Fix available: RHSA-2026:88424 · Red Hat
  22. 2026-11-03 Fix available: RHSA-2026:88425 · Red Hat
  23. 2026-11-03 Fix available: RHSA-2026:88474 · Red Hat
  24. 2026-11-03 Fix available: RHSA-2026:89735 · Red Hat
  25. 2026-11-03 Fix available: RHSA-2026:88422 · Red Hat
  26. 2026-11-05 Affected versions changed · Red Hat
  27. 2026-11-05 Fix available: RHSA-2026:86192 · Red Hat
  28. 2026-11-05 Fix available: RHSA-2026:86195 · Red Hat
  29. 2026-11-05 Fix available: RHSA-2026:86193 · Red Hat

References

Patch 1

Advisory 1

Other 4

  • 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