CVE-2026-25667
7.5
HIGH
CVSS 3.1
EPSS 6.6%
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.
How to fix CVE-2026-25667
To remediate CVE-2026-25667, upgrade the affected package to a fixed version below.
- Bitnami/dotnet—upgrade to 8.0.22 or later
- —upgrade to 8.0.22 or later
Is CVE-2026-25667 being exploited?
Moderate — EPSS is 6.6%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (2)
- >= 8.0.0, < 8.0.22, >= 9.0.0, < 9.0.11
- >= 8.0.0, < 8.0.22, >= 9.0.0, < 9.0.11
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |