How severe is GHSA-3m2r-q8x3-xmf7?

No CVSS score has been assigned to GHSA-3m2r-q8x3-xmf7 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-3m2r-q8x3-xmf7?

GHSA-3m2r-q8x3-xmf7 affects the following packages: Microsoft.AspNetCore.Server.Kestrel.Core (NuGet), Microsoft.AspNetCore.Server.Kestrel.Transport.Abstractions (NuGet), Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv (NuGet), Microsoft.AspNetCore.All (NuGet). Ecosystems affected: NuGet.

How do I fix GHSA-3m2r-q8x3-xmf7?

Update Microsoft.AspNetCore.Server.Kestrel.Core to 2.0.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-3m2r-q8x3-xmf7 is resolved across your whole dependency graph.

How do I detect GHSA-3m2r-q8x3-xmf7 in my NuGet dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for Microsoft.AspNetCore.Server.Kestrel.Core. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

How do I mitigate GHSA-3m2r-q8x3-xmf7 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

How does O3 Security protect against GHSA-3m2r-q8x3-xmf7?

O3 pinpoints whether GHSA-3m2r-q8x3-xmf7 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Is GHSA-3m2r-q8x3-xmf7 actively exploited in the wild?

No public exploit code has been indexed for GHSA-3m2r-q8x3-xmf7 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.

When was GHSA-3m2r-q8x3-xmf7 published, and has it been updated?

GHSA-3m2r-q8x3-xmf7 was published on October 16, 2018 and was last updated on December 2, 2024. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

.NET NuGet

GHSA-3m2r-q8x3-xmf7

GHSA-3m2r-q8x3-xmf7 is a security vulnerability in Microsoft.AspNetCore.Server.Kestrel.Core. O3 Security confirms whether GHSA-3m2r-q8x3-xmf7 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Moderate severity vulnerability that affects Microsoft.AspNetCore.All, Microsoft.AspNetCore.Server.Kestrel.Core, Microsoft.AspNetCore.Server.Kestrel.Transport.Abstractions, and Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv

Published

Oct 16, 2018

Updated

Dec 2, 2024

Affected

4 pkgs

Patched

4 / 4

Exploits

None indexed

Blast Radius

4 pkgs affected

.NETMicrosoft.AspNetCore.Server.Kestrel.Core.NETMicrosoft.AspNetCore.Server.Kestrel.Transport.Abstractions.NETMicrosoft.AspNetCore.Server.Kestrel.Transport.Libuv.NETMicrosoft.AspNetCore.All

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

Microsoft made an internal discovery of a security vulnerability in version 2.x of ASP.NET Core where a specially crafted request can cause excess resource consumption in Kestrel.

Affected Packages

4 total 4 fixed

Ecosystem	Package	Vulnerable range	Fix
.NETNuGet	`Microsoft.AspNetCore.Server.Kestrel.Core`	≥ 2.0.0&&< 2.0.3	2.0.3
.NETNuGet	`Microsoft.AspNetCore.Server.Kestrel.Transport.Abstractions`	≥ 2.0.0&&< 2.0.3	2.0.3
.NETNuGet	`Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv`	≥ 2.0.0&&< 2.0.3	2.0.3
.NETNuGet	`Microsoft.AspNetCore.All`	≥ 2.0.0&&< 2.0.8	2.0.8

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.Server.Kestrel.Core. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update Microsoft.AspNetCore.Server.Kestrel.Core to 2.0.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-3m2r-q8x3-xmf7 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-3m2r-q8x3-xmf7 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-3m2r-q8x3-xmf7. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

Microsoft made an internal discovery of a security vulnerability in version 2.x of ASP.NET Core where a specially crafted request can cause excess resource consumption in Kestrel.

O3 Security · Impact-Aware SCA

Is GHSA-3m2r-q8x3-xmf7 in your dependencies?

O3 detects GHSA-3m2r-q8x3-xmf7 across NuGet dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my dependencies How O3 SCA works