CVE-2026-56170 json
ASP.NET Core Denial of Service Vulnerability
published 2026-07-14 3 mo ago modified 2026-11-01 7 d ago also BIT-dotnet-2026-56170 , BIT-dotnet-sdk-2026-56170 , EUVD-2026-44045 , GHSA-j8gr-8fp3-5q5h
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.2%
- EPSS 1.2% chance of exploitation in 30 days, percentile 67%
- public exploits
- 0
- none known
Summary
Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.
Patch / fix
- nuget Microsoft.AspNetCore.App.Runtime.linux-arm 8.0.26, 9.0.15, 10.0.6
- nuget Microsoft.AspNetCore.App.Runtime.linux-arm64 8.0.26, 9.0.15, 10.0.6
- nuget Microsoft.AspNetCore.App.Runtime.linux-musl-arm 8.0.26, 9.0.15, 10.0.6
- nuget Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 8.0.26, 9.0.15, 10.0.6
- nuget Microsoft.AspNetCore.App.Runtime.linux-musl-x64 8.0.26, 9.0.15, 10.0.6
- nuget Microsoft.AspNetCore.App.Runtime.linux-x64 8.0.26, 9.0.15, 10.0.6
- nuget Microsoft.AspNetCore.App.Runtime.osx-arm64 8.0.26, 9.0.15, 10.0.6
- nuget Microsoft.AspNetCore.App.Runtime.osx-x64 8.0.26, 9.0.15, 10.0.6
- nuget Microsoft.AspNetCore.App.Runtime.win-arm 8.0.26, 9.0.15, 10.0.6
- nuget Microsoft.AspNetCore.App.Runtime.win-arm64 8.0.26, 9.0.15, 10.0.6
- nuget Microsoft.AspNetCore.App.Runtime.win-x64 8.0.26, 9.0.15, 10.0.6
- nuget Microsoft.AspNetCore.App.Runtime.win-x86 8.0.26, 9.0.15, 10.0.6
- bitnami dotnet 8.0.29, 9.0.18, 10.0.6
- bitnami dotnet-sdk 8.0.29, 9.0.18, 10.0.6
- Microsoft .NET 10.0 runtime 10.0.10
- Microsoft .NET 8.0 runtime 8.0.29
- Microsoft .NET 9.0 runtime 9.0.18
- dotnet8 Ubuntu 22.04 LTS 8.0.126-8.0.26-0ubuntu1~22.04.1
- dotnet8 Ubuntu 24.04 LTS 8.0.126-8.0.26-0ubuntu1~24.04.1
- dotnet8 Ubuntu 25.10 8.0.126-8.0.26-0ubuntu1~25.10.1
- dotnet9 Ubuntu 25.10 9.0.115-9.0.14-0ubuntu1~25.10.1
- dotnet10 Ubuntu 24.04 LTS 10.0.106-10.0.6-0ubuntu1~24.04.1
- dotnet10 Ubuntu 25.10 10.0.106-10.0.6-0ubuntu1~25.10.1
- dotnet10 Ubuntu 26.10, Ubuntu 26.04 LTS 10.0.107-10.0.7-0ubuntu1~26.04.1
ubuntu advisories UBUNTU-CVE-2026-56170
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
- dotnet8.0 hummingbird 1 8.0.129-2.1.hum1
- dotnet-sdk-8.0 hummingbird 1 8.0.129-2.1.hum1
- dotnet-hostfxr-8.0 hummingbird 1 8.0.29-2.1.hum1
- dotnet-runtime-8.0 hummingbird 1 8.0.29-2.1.hum1
- dotnet-sdk-dbg-8.0 hummingbird 1 8.0.129-2.1.hum1
- dotnet-templates-8.0 hummingbird 1 8.0.129-2.1.hum1
- aspnetcore-runtime-8.0 hummingbird 1 8.0.29-2.1.hum1
- dotnet-runtime-dbg-8.0 hummingbird 1 8.0.29-2.1.hum1
red hat advisories RHSA-2026:58570RHSA-2026:58568RHSA-2026:58569RHSA-2026:58567RHSA-2026:58566RHSA-2026:42145
- dotnet-sdk-8.0 AlmaLinux 10 8.0.129-1.el10_2
- dotnet-hostfxr-8.0 AlmaLinux 10 8.0.29-1.el10_2
- dotnet-runtime-8.0 AlmaLinux 10 8.0.29-1.el10_2
- dotnet-sdk-dbg-8.0 AlmaLinux 10 8.0.129-1.el10_2
- dotnet-templates-8.0 AlmaLinux 10 8.0.129-1.el10_2
- aspnetcore-runtime-8.0 AlmaLinux 10 8.0.29-1.el10_2
- dotnet-runtime-dbg-8.0 AlmaLinux 10 8.0.29-1.el10_2
- dotnet-apphost-pack-8.0 AlmaLinux 10 8.0.29-1.el10_2
almalinux advisories ALSA-2026:41893ALSA-2026:41894ALSA-2026:41895ALSA-2026:41896ALSA-2026:41897ALSA-2026:41898
- dotnet8.0 Rocky Linux 10 8.0.129-1.el10_2
- dotnet9.0 Rocky Linux 10 9.0.119-1.el10_2
- dotnet10.0 Rocky Linux 10 10.0.110-1.el10_2
- dotnet8.0 Rocky Linux 9 8.0.129-1.el9_8
- dotnet9.0 Rocky Linux 9 9.0.119-1.el9_8
- dotnet10.0 Rocky Linux 9 10.0.110-1.el9_8
- dotnet9.0 Rocky Linux 8 9.0.119-1.el8_10
- dotnet10.0 Rocky Linux 8 10.0.110-1.el8_10
rocky linux advisories RLSA-2026:41893RLSA-2026:41895RLSA-2026:41897RLSA-2026:41894RLSA-2026:41896RLSA-2026:41898
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2026-56170 updated cvss 7.5
ASP.NET Core: ASP.NET Core: Denial of Service via uncontrolled resource allocation
-
Red Hat CodeReady Linux Builder EUS (v.9.6) dotnet-sdk-8.0-source-built-artifacts 8.0.130-1.el9_6, dotnet-sdk-9.0-source-built-artifacts 9.0.120-1.el9_6fixed: vendor fix RHSA-2026:58569
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Red Hat Enterprise Linux AppStream (v. 8) dotnet 10.0.110-1.el8_10, dotnet8.0 8.0.129-1.el8_10, dotnet9.0 9.0.119-1.el8_10, dotnet-host 10.0.10-1.el8_10, dotnet10.0 10.0.110-1.el8_10, dotnet-sdk-8.0 8.0.129-1.el8_10, +35 morefixed: vendor fix RHSA-2026:41900
-
Red Hat Enterprise Linux AppStream (v. 9) dotnet8.0 8.0.129-1.el9_8, dotnet9.0 9.0.119-1.el9_8, dotnet-host 10.0.10-1.el9_8, dotnet10.0 10.0.110-1.el9_8, dotnet-sdk-8.0 8.0.129-1.el9_8, dotnet-sdk-9.0 9.0.119-1.el9_8, +34 morefixed: vendor fix RHSA-2026:41898
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Red Hat Enterprise Linux AppStream (v. 10) dotnet8.0 8.0.129-1.el10_2, dotnet9.0 9.0.119-1.el10_2, dotnet-host 10.0.10-1.el10_2, dotnet10.0 10.0.110-1.el10_2, dotnet-sdk-8.0 8.0.129-1.el10_2, dotnet-sdk-9.0 9.0.119-1.el10_2, +34 morefixed: vendor fix RHSA-2026:41897
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Red Hat Enterprise Linux AppStream E4S (v.9.4) dotnet8.0 8.0.130-1.el9_4, dotnet-host 8.0.30-1.el9_4, dotnet-sdk-8.0 8.0.130-1.el9_4, dotnet-hostfxr-8.0 8.0.30-1.el9_4, dotnet-runtime-8.0 8.0.30-1.el9_4, dotnet-sdk-dbg-8.0 8.0.130-1.el9_4, +8 morefixed: vendor fix RHSA-2026:58568
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Red Hat Enterprise Linux AppStream EUS (v. 10.0) dotnet8.0 8.0.130-1.el10_0, dotnet9.0 9.0.120-1.el10_0, dotnet-host 9.0.19-1.el10_0, dotnet-sdk-8.0 8.0.130-1.el10_0, dotnet-sdk-9.0 9.0.120-1.el10_0, dotnet-hostfxr-8.0 8.0.30-1.el10_0, +21 morefixed: vendor fix RHSA-2026:58566
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Red Hat Enterprise Linux AppStream EUS (v.9.6) dotnet8.0 8.0.130-1.el9_6, dotnet9.0 9.0.120-1.el9_6, dotnet-host 9.0.19-1.el9_6, dotnet-sdk-8.0 8.0.130-1.el9_6, dotnet-sdk-9.0 9.0.120-1.el9_6, dotnet-hostfxr-8.0 8.0.30-1.el9_6, +21 morefixed: vendor fix RHSA-2026:58569
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Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) dotnet-sdk-8.0-source-built-artifacts 8.0.129-1.el9_8, dotnet-sdk-9.0-source-built-artifacts 9.0.119-1.el9_8, dotnet-sdk-10.0-source-built-artifacts 10.0.110-1.el9_8fixed: vendor fix RHSA-2026:41898
show 5 moreshow fewer
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Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) dotnet-sdk-8.0-source-built-artifacts 8.0.129-1.el10_2, dotnet-sdk-9.0-source-built-artifacts 9.0.119-1.el10_2, dotnet-sdk-10.0-source-built-artifacts 10.0.110-1.el10_2fixed: vendor fix RHSA-2026:41897
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Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) dotnet-sdk-8.0-source-built-artifacts 8.0.130-1.el10_0, dotnet-sdk-9.0-source-built-artifacts 9.0.120-1.el10_0fixed: vendor fix RHSA-2026:58566
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Red Hat Enterprise Linux CRB (v. 8) dotnet-sdk-8.0-source-built-artifacts 8.0.129-1.el8_10, dotnet-sdk-9.0-source-built-artifacts 9.0.119-1.el8_10, dotnet-sdk-10.0-source-built-artifacts 10.0.110-1.el8_10fixed: vendor fix RHSA-2026:41900
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Red Hat Hardened Images dotnet9.0 9.0.119-1.hum1, dotnet10.0 10.0.109-1.hum1, dotnet8.0 8.0.129-2.1.hum1, aspnetcore-runtime-9.0 9.0.18-1.hum1, aspnetcore-runtime-10.0 10.0.9-1.hum1, aspnetcore-runtime-8.0 8.0.29-2.1.hum1fixed: vendor fix RHSA-2026:26638
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Red Hat OpenShift Dev Spaces devspaces/udi-rhel9not affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
1.17% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| OSV | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| nuget | Microsoft.AspNetCore.App.Runtime.linux-arm | >=10.0.0, <10.0.6 >=9.0.0, <9.0.15 >=8.0.0, <8.0.26 |
10.0.6 9.0.15 8.0.26 |
| nuget | Microsoft.AspNetCore.App.Runtime.linux-arm64 | >=10.0.0, <10.0.6 >=9.0.0, <9.0.15 >=8.0.0, <8.0.26 |
10.0.6 9.0.15 8.0.26 |
| nuget | Microsoft.AspNetCore.App.Runtime.linux-musl-arm | >=10.0.0, <10.0.6 >=9.0.0, <9.0.15 >=8.0.0, <8.0.26 |
10.0.6 9.0.15 8.0.26 |
| nuget | Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 | >=10.0.0, <10.0.6 >=9.0.0, <9.0.15 >=8.0.0, <8.0.26 |
10.0.6 9.0.15 8.0.26 |
| nuget | Microsoft.AspNetCore.App.Runtime.linux-musl-x64 | >=10.0.0, <10.0.6 >=9.0.0, <9.0.15 >=8.0.0, <8.0.26 |
10.0.6 9.0.15 8.0.26 |
| nuget | Microsoft.AspNetCore.App.Runtime.linux-x64 | >=10.0.0, <10.0.6 >=9.0.0, <9.0.15 >=8.0.0, <8.0.26 |
10.0.6 9.0.15 8.0.26 |
| nuget | Microsoft.AspNetCore.App.Runtime.osx-arm64 | >=10.0.0, <10.0.6 >=9.0.0, <9.0.15 >=8.0.0, <8.0.26 |
10.0.6 9.0.15 8.0.26 |
| nuget | Microsoft.AspNetCore.App.Runtime.osx-x64 | >=10.0.0, <10.0.6 >=9.0.0, <9.0.15 >=8.0.0, <8.0.26 |
10.0.6 9.0.15 8.0.26 |
| nuget | Microsoft.AspNetCore.App.Runtime.win-arm | >=10.0.0, <10.0.6 >=9.0.0, <9.0.15 >=8.0.0, <8.0.26 |
10.0.6 9.0.15 8.0.26 |
| nuget | Microsoft.AspNetCore.App.Runtime.win-arm64 | >=10.0.0, <10.0.6 >=9.0.0, <9.0.15 >=8.0.0, <8.0.26 |
10.0.6 9.0.15 8.0.26 |
| nuget | Microsoft.AspNetCore.App.Runtime.win-x64 | >=10.0.0, <10.0.6 >=9.0.0, <9.0.15 >=8.0.0, <8.0.26 |
10.0.6 9.0.15 8.0.26 |
| nuget | Microsoft.AspNetCore.App.Runtime.win-x86 | >=10.0.0, <10.0.6 >=9.0.0, <9.0.15 >=8.0.0, <8.0.26 |
10.0.6 9.0.15 8.0.26 |
| bitnami | dotnet | >=8.0.0, <8.0.29 >=9.0.0, <9.0.18 >=10.0.0, <10.0.6 |
8.0.29 9.0.18 10.0.6 |
| bitnami | dotnet-sdk | >=8.0.0, <8.0.29 >=9.0.0, <9.0.18 >=10.0.0, <10.0.6 |
8.0.29 9.0.18 10.0.6 |
Affected products
- Microsoft .NET 10.0 runtime
- Microsoft .NET 8.0 runtime
- Microsoft .NET 9.0 runtime
Classification
- Weakness
-
- CWE-770 Allocation of Resources Without Limits or Throttling
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2026-56170
vendor-advisory, patch, web, advisory
-
github.com
/dotnet/aspnetcore/security/advisories/GHSA-j8gr-8fp3-5q5h
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-56170
advisory, web
-
github.com
/dotnet/announcements/issues/424
web
-
github.com
/dotnet/aspnetcore
package
-
github.com
/dotnet/aspnetcore/discussions/67787
web
Sources
- CVE List CVE-2026-56170
- GitHub Advisory GHSA-j8gr-8fp3-5q5h
- NVD CVE-2026-56170
- OSV BIT-dotnet-2026-56170
- OSV BIT-dotnet-sdk-2026-56170
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.