CVE-2026-25667 | THREATINT

Description

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.

PUBLISHED Reserved 2026-02-04 | Published 2026-03-19 | Updated 2026-04-29 | Assigner mitre

References

github.com/IsaJafarov/Kestrel-DoS

github.com/...ommit/96ccc40a0e095424b19506e8268b9b1a3e23d6a7

github.com/IsaJafarov/Q3Fuzz

cve.org (CVE-2026-25667)

nvd.nist.gov (CVE-2026-25667)

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