CVE-2026-25667

CVSS 7.5 HIGHEPSS 3.0%CWE-400

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.5EPSS 3.0%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

19 Mar 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

ASP.NET Core Kestrel in Microsoft .NET 8.0 before 8.0.22 and .NET 9.0 before 9.0.11 allows a remote attacker to cause excessive CPU consumption by sending a crafted QUIC packet, because of an incorrect exit condition for HTTP/3 Encoder/Decoder stream processing.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

n/a · n/a

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References

https://github.com/dotnet/aspnetcore/commit/96ccc40a0e095424b19506e8268b9b1a3e23d6a7#diff-667d5b3693f93a0f706ab211428998b210862f9b885d917104d2013118312626 https://github.com/IsaJafarov/Kestrel-DoS https://github.com/IsaJafarov/Q3Fuzz