CVE-2026-54775
Medium
Description
CoreWCF is a port of the service side of Windows Communication Foundation (WCF) to .NET Core. Prior to 1.8.1 and 1.9.1, a CoreWCF service listening on a Kafka topic stops processing new records from that topic when KafkaTransportPump receives a null-value tombstone record, causing a persistent endpoint denial of service for attackers with produce permission. This issue is fixed in versions 1.8.1 and 1.9.1.
SeverityMedium
CVSS6.5
Exploit probability—
ProductCorewcf.kafka
PublishedJul 8, 2026
First seenJul 8, 2026
Weakness typeCWE-248CWE-248CWE-754CWE-754CWE-755CWE-755
How to fix
Update
- CoreWCF.Kafka1.8.1, 1.9.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| CoreWCF.KafkaNuGet | v < 1.8.1, 1.9.0 ≤ v < 1.9.1 | 1.8.1, 1.9.1 |
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