CVE-2026-25667: 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…

PriorityP352high7.5CVSS 3.1

AVNACLPRNUINSUCNINAH

EPSS

3.00%

85.9th percentile

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.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
microsoft	net	>= 8.0.0 < 8.0.22	8.0.22
microsoft	net	>= 9.0.0 < 9.0.11	9.0.11

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