What is CVE-2023-33141?

CVE-2023-33141 is a high-severity uncontrolled resource consumption vulnerability in Yarp.ReverseProxy (nuget), affecting versions <= 1.1.1. It is fixed in 1.1.2, 2.0.1. Crafted input forces the application to consume excessive CPU, memory, or other resources, degrading or denying service.

How severe is CVE-2023-33141?

CVE-2023-33141 has a CVSS score of 7.5 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Which versions of Yarp.ReverseProxy are affected by CVE-2023-33141?

Yarp.ReverseProxy (nuget) versions <= 1.1.1 is affected.

Is there a fix for CVE-2023-33141?

Yes. CVE-2023-33141 is fixed in 1.1.2, 2.0.1. Upgrade to this version or later.

Is CVE-2023-33141 exploitable, and should I be worried?

Whether CVE-2023-33141 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

What actually determines whether CVE-2023-33141 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

How do I fix CVE-2023-33141?

Upgrade: Yarp.ReverseProxy to 1.1.2 or later, Yarp.ReverseProxy to 2.0.1 or later.

CVE-2023-33141 in Yarp.ReverseProxy

Q: How severe is CVE-2023-33141?

CVE-2023-33141 has a CVSS score of 7.5 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Q: Which versions of Yarp.ReverseProxy are affected by CVE-2023-33141?

Yarp.ReverseProxy (nuget) versions <= 1.1.1 is affected.

Q: Is there a fix for CVE-2023-33141?

Yes. CVE-2023-33141 is fixed in 1.1.2, 2.0.1. Upgrade to this version or later.

Q: Is CVE-2023-33141 exploitable, and should I be worried?

Whether CVE-2023-33141 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

Q: What actually determines whether CVE-2023-33141 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

Q: How do I fix CVE-2023-33141?

Upgrade: Yarp.ReverseProxy to 1.1.2 or later, Yarp.ReverseProxy to 2.0.1 or later.

Summary

YARP Denial of Service Vulnerability

References

CVE-2023-33141

Impact

A denial of service vulnerability exists in YARP.

Crafted input forces the application to consume excessive CPU, memory, or other resources, degrading or denying service. Typical impact: denial of service.

CVE-2023-33141 has a CVSS score of 7.5 (High). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (1.1.2, 2.0.1); upgrading removes the vulnerable code path.

Affected versions

Yarp.ReverseProxy (<= 1.1.1) Yarp.ReverseProxy (= 2.0.0)

Security releases

Yarp.ReverseProxy → 1.1.2 (nuget) Yarp.ReverseProxy → 2.0.1 (nuget)

Kodem intelligence

Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.

Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.

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Remediation advice

If you're using YARP 1.x, you should update to NuGet package version 1.1.2.
If you're using YARP 2.0.0, you should update to NuGet package version 2.0.1.

You can do so by updating the PackageReference in your .csproj file

<ItemGroup>
- <PackageReference Include="Yarp.ReverseProxy" Version="2.0.0" />
- <PackageReference Include="Yarp.Telemetry.Consumption" Version="2.0.0" />
+ <PackageReference Include="Yarp.ReverseProxy" Version="2.0.1" />
+ <PackageReference Include="Yarp.Telemetry.Consumption" Version="2.0.1" />
</ItemGroup>

or by selecting 2.0.1 in the NuGet UI inside Visual Studio (Manage NuGet Packages / Updates)

Frequently Asked Questions

What is CVE-2023-33141? CVE-2023-33141 is a high-severity uncontrolled resource consumption vulnerability in Yarp.ReverseProxy (nuget), affecting versions <= 1.1.1. It is fixed in 1.1.2, 2.0.1. Crafted input forces the application to consume excessive CPU, memory, or other resources, degrading or denying service.
How severe is CVE-2023-33141? CVE-2023-33141 has a CVSS score of 7.5 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
Which versions of Yarp.ReverseProxy are affected by CVE-2023-33141? Yarp.ReverseProxy (nuget) versions <= 1.1.1 is affected.
Is there a fix for CVE-2023-33141? Yes. CVE-2023-33141 is fixed in 1.1.2, 2.0.1. Upgrade to this version or later.
Is CVE-2023-33141 exploitable, and should I be worried? Whether CVE-2023-33141 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
What actually determines whether CVE-2023-33141 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
How do I fix CVE-2023-33141?
- Upgrade Yarp.ReverseProxy to 1.1.2 or later
- Upgrade Yarp.ReverseProxy to 2.0.1 or later

Other vulnerabilities in Yarp.ReverseProxy

CVE-IDSeverityPackage summary

CVE-2022-26924HighYarp.ReverseProxy: YARP Denial of Service Vulnerability