How severe is CVE-2022-29117?

CVE-2022-29117 has a CVSS score of 7.5/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2022-29117?

CVE-2022-29117 affects the following packages: Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet), Microsoft.Owin.Security.Cookies (NuGet), Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet), Microsoft.Owin (NuGet), Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet), Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet), Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet), Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet), and 28 more. Ecosystems affected: NuGet.

How do I fix CVE-2022-29117?

Update Microsoft.AspNetCore.App.Runtime.win-x64 to 3.1.25 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-29117 is resolved across your whole dependency graph.

How do I detect CVE-2022-29117 in my NuGet dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for Microsoft.AspNetCore.App.Runtime.win-x64, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2022-29117 if there is no patch (or I can't update yet)?

Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Is CVE-2022-29117 actively exploited in the wild?

No public exploit code has been indexed for CVE-2022-29117 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2022-29117?

CVE-2022-29117 has an EPSS (Exploit Prediction Scoring System) score of 5.7%, placing it in the 93th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2022-29117?

CVE-2022-29117 is classified as Uncontrolled Resource Consumption (CWE-400). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2022-29117 published, and has it been updated?

CVE-2022-29117 was published on May 10, 2022 and was last updated on October 24, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

.NET

.NET NuGet

Not in CISA KEV

HIGH severity

CVE-2022-29117 — Microsoft.AspNetCore.App.…

HIGH

CVE-2022-29117 is a high-severity (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in Microsoft.AspNetCore.App.Runtime.win-x64. A fix is available for Microsoft.AspNetCore.App.Runtime.win-x64 — see the affected versions and patch details below.

.NET Denial of Service Vulnerability

Also known asBIT-dotnet-2022-29117BIT-dotnet-sdk-2022-29117GHSA-3rq8-h3gj-r5c6

Published

May 10, 2022

Updated

Oct 24, 2026

Affected

36 pkgs

Patched

36 / 36

Exploits

None indexed

Exploitation data as of Nov 4, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2022-29117.

EPSS Exploitation Probability

via FIRST.org ↗

5.7%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs93th percentile — riskier than 93% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

36 pkgs affected

.NETMicrosoft.AspNetCore.App.Runtime.win-x64.NETMicrosoft.Owin.Security.Cookies.NETMicrosoft.AspNetCore.App.Runtime.win-x64.NETMicrosoft.Owin.NETMicrosoft.AspNetCore.App.Runtime.win-x64.NETMicrosoft.AspNetCore.App.Runtime.linux-x64.NETMicrosoft.AspNetCore.App.Runtime.linux-x64.NETMicrosoft.AspNetCore.App.Runtime.linux-x64+28 more

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects NuGet packages — download data is not available via public APIs for these ecosystems.

Description

A vulnerability exists in .NET 6.0, .NET 5.0 and .NET core 3.1 where a malicious client can manipulate cookies and cause a Denial of Service.

Affected software

Any .NET 6.0 application running on .NET 6.0.4 or earlier.
Any .NET 5.0 application running .NET 5.0.16 or earlier.
Any .NET Core 3.1 application running on .NET Core 3.1.24 or earlier.

Affected packages

.NET Core 3.1

Package name	Affected versions	Patched versions
Microsoft.Owin.Security.Cookies	<4.2.2	4.2.2
Microsoft.Owin.Security	<4.2.2	4.2.2
Microsoft.AspNetCore.App.Runtime.win-x64	>=3.0.0,3.1.24	3.1.25
Microsoft.AspNetCore.App.Runtime.linux-x64	>=3.0.0,3.1.24	3.1.25
Microsoft.AspNetCore.App.Runtime.win-x86	>=3.0.0,3.1.24	3.1.25
Microsoft.AspNetCore.App.Runtime.osx-x64	>=3.0.0,3.1.24	3.1.25
Microsoft.AspNetCore.App.Runtime.linux-musl-x64	>=3.0.0,3.1.24	3.1.25
Microsoft.AspNetCore.App.Runtime.linux-arm64	>=3.0.0,3.1.24	3.1.25
Microsoft.AspNetCore.App.Runtime.linux-arm	>=3.0.0,3.1.24	3.1.25
Microsoft.AspNetCore.App.Runtime.win-arm64	>=3.0.0,3.1.24	3.1.25
Microsoft.AspNetCore.App.Runtime.win-arm	>=3.0.0,3.1.24	3.1.25
Microsoft.AspNetCore.App.Runtime.linux-musl-arm64	>=3.0.0,3.1.24	3.1.25
Microsoft.AspNetCore.App.Runtime.linux-musl-arm	>=3.0.0,3.1.24	3.1.25

.NET 5.0

Affected packages	Affected versions	Patched versions
Microsoft.Owin.Security.Cookies	< 4.2.2	4.2.2
Microsoft.AspNetCore.App.Runtime.win-x64	>=5.0.0,5.0.16	5.0.17
Microsoft.AspNetCore.App.Runtime.linux-x64	>=5.0.0,5.0.16	5.0.17
Microsoft.AspNetCore.App.Runtime.win-x86	>=5.0.0,5.0.16	5.0.17
Microsoft.AspNetCore.App.Runtime.osx-x64	>=5.0.0,5.0.16	5.0.17
Microsoft.AspNetCore.App.Runtime.linux-musl-x64	>=5.0.0,5.0.16	5.0.17
Microsoft.AspNetCore.App.Runtime.linux-arm64	>=5.0.0,5.0.16	5.0.17
Microsoft.AspNetCore.App.Runtime.linux-arm	>=5.0.0,5.0.16	5.0.17
Microsoft.AspNetCore.App.Runtime.win-arm64	>=5.0.0,5.0.16	5.0.17
Microsoft.AspNetCore.App.Runtime.win-arm	>=5.0.0,5.0.16	5.0.17
Microsoft.AspNetCore.App.Runtime.linux-musl-arm64	>=5.0.0,5.0.16	5.0.17
Microsoft.AspNetCore.App.Runtime.linux-musl-arm	>=5.0.0,5.0.16	5.0.17

.NET 6.0

Affected packages	Affected versions	Patched versions
Microsoft.Owin.Security.Cookies	<4.2.2	4.2.2
Microsoft.AspNetCore.App.Runtime.win-x64	>=6.0.0,6.0.4	6.0.5
Microsoft.AspNetCore.App.Runtime.linux-x64	>=6.0.0,6.0.4	6.0.5
Microsoft.AspNetCore.App.Runtime.win-x86	>=6.0.0,6.0.4	6.0.5
Microsoft.AspNetCore.App.Runtime.osx-x64	>=6.0.0,6.0.4	6.0.5
Microsoft.AspNetCore.App.Runtime.linux-musl-x64	>=6.0.0,6.0.4	6.0.5
Microsoft.AspNetCore.App.Runtime.linux-arm64	>=6.0.0,6.0.4	6.0.5
Microsoft.AspNetCore.App.Runtime.linux-arm	>=6.0.0,6.0.4	6.0.5
Microsoft.AspNetCore.App.Runtime.win-arm64	>=6.0.0,6.0.4	6.0.5
Microsoft.AspNetCore.App.Runtime.win-arm	>=6.0.0,6.0.4	6.0.5
Microsoft.AspNetCore.App.Runtime.osx-arm64	>=6.0.0,6.0.4	6.0.5
Microsoft.AspNetCore.App.Runtime.linux-musl-arm64	>=6.0.0,6.0.4	6.0.5
Microsoft.AspNetCore.App.Runtime.linux-musl-arm	>=6.0.0,6.0.4	6.0.5

Patches

If you're using .NET Core 6.0, you should download and install Runtime 6.0.5 or SDK 6.0.105 (for Visual Studio 2022 v17.0) or SDK 6.0.203 (for Visual Studio 2022 v17.1) from https://dotnet.microsoft.com/download/dotnet-core/6.0.
If you're using .NET 5.0, you should download and install Runtime 5.0.17 or SDK 5.0.214 (for Visual Studio 2019 v16.9) or SDK 5.0.408 (for Visual Studio 2011 v16.11) from https://dotnet.microsoft.com/download/dotnet-core/5.0.
If you're using .NET Core 3.1, you should download and install Runtime 3.1.25 or SDK 3.1.419 (for Visual Studio 2019 v16.9 or Visual Studio 2011 16.11 or Visual Studio 2022 17.0 or Visual Studio 2022 17.1 ) from https://dotnet.microsoft.com/download/dotnet-core/3.1.

.NET 6.0, .NET 5.0 and .NET Core 3.1 updates are also available from Microsoft Update. To access this either type "Check for updates" in your Windows search, or open Settings, choose Update & Security and then click Check for Updates.

Other Details

Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/220
An Issue for this can be found at https://github.com/dotnet/aspnetcore/issues/41608
MSRC details for this can be found at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-29117

Affected Packages

36 total 36 fixed

Ecosystem	Package	Vulnerable range	Fix
.NETNuGet	`Microsoft.AspNetCore.App.Runtime.win-x64`	≥ 3.0.0&&< 3.1.25	3.1.25`dotnet add package Microsoft.AspNetCore.App.Runtime.win-x64 --version 3.1.25`
.NETNuGet	`Microsoft.Owin.Security.Cookies`	all versions	4.2.2`dotnet add package Microsoft.Owin.Security.Cookies --version 4.2.2`
.NETNuGet	`Microsoft.AspNetCore.App.Runtime.win-x64`	≥ 5.0.0&&< 5.0.17	5.0.17`dotnet add package Microsoft.AspNetCore.App.Runtime.win-x64 --version 5.0.17`
.NETNuGet	`Microsoft.Owin`	all versions	4.2.2`dotnet add package Microsoft.Owin --version 4.2.2`
.NETNuGet	`Microsoft.AspNetCore.App.Runtime.win-x64`	≥ 6.0.0&&< 6.0.5	6.0.5`dotnet add package Microsoft.AspNetCore.App.Runtime.win-x64 --version 6.0.5`
.NETNuGet	`Microsoft.AspNetCore.App.Runtime.linux-x64`	≥ 3.0.0&&< 3.1.25	3.1.25`dotnet add package Microsoft.AspNetCore.App.Runtime.linux-x64 --version 3.1.25`

Affected Products

5 products · 9 configurations

fedorafedoraproject

3 versions

343536

Application

.netmicrosoft

2 versions

5.06.0.0

Application

.net coremicrosoft

1 version

3.1

Application

visual studio 2019microsoft

≥ 16.0 && ≤ 16.0.11

range

Application

visual studio 2022microsoft

2 versions

17.017.1

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for Microsoft.AspNetCore.App.Runtime.win-x64, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update Microsoft.AspNetCore.App.Runtime.win-x64 to 3.1.25 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-29117 is resolved across your whole dependency graph.
Workarounds
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatImportant

Affected .NET versions: 6.0, 5.0, 3.1.

Product	Fixed in	Advisory
.NET Core on Red Hat Enterprise Linux	`rh-dotnet31-dotnet-0:3.1.419-1.el7_9`	RHSA-2022:2194
.NET Core on Red Hat Enterprise Linux	`rh-dotnet50-dotnet-0:5.0.214-1.el7_9`	RHSA-2022:2196
.NET Core on Red Hat Enterprise Linux	`rh-dotnet60-dotnet-0:6.0.105-1.el7_9`	RHSA-2022:2195
Red Hat Enterprise Linux 8	`dotnet6.0-0:6.0.105-1.el8_6`	RHSA-2022:2199
Red Hat Enterprise Linux 8	`dotnet5.0-0:5.0.214-1.el8_6`	RHSA-2022:2200
Red Hat Enterprise Linux 8	`dotnet3.1-0:3.1.419-1.el8_6`	RHSA-2022:2202
Red Hat Enterprise Linux 9	`dotnet6.0-0:6.0.105-1.el9_0`	RHSA-2022:4588

Frequently Asked Questions

Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 6.0, .NET 5.0 and .NET Core 3.1. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A vulnerability exists in .NET 6.0, .NET 5.0 and .NET core 3.1 where a malicious client can manipulate cookies and cause a Denial of Service. ### Affected software * Any .NET 6.0 application running on .NET 6.0.4 or earlier. * Any .NET 5.0 application running .NET 5.0.16 or earlier. * Any .NET Core 3.1 application running on .NET Core 3.1.24

O3 Security · Impact-Aware SCA

Is CVE-2022-29117 in your dependencies?

Find it across NuGet, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVE-2022-29117 — Microsoft.AspNetCore.App.…

Exploitation Status

No confirmed exploitation observed yet

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected software

Affected packages

Patches

Other Details

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Fixing This On Your OS

Frequently Asked Questions

Is CVE-2022-29117 in your dependencies?