CVE-2026-54775 CoreWCF: Kafka consume pump halts permanently on a Kafka tombstone (null-value record), causing persistent endpoint denial of service.

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...

CVE-2026-54775

Summary: CVE-2026-54775 affects CoreWCF.Kafka’s KafkaTransportPump. Before versions 1.8.1 and 1.9.1, a null-value tombstone (Kafka tombstone) on a topic causes the pump to halt, stopping processing of new records and potentially causing persistent endpoint denial of service for topics with produc...

CVE-2026-54775: Uncaught Exception

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...

GHSA-M744-JHQ9-PPW6 CoreWCF: Kafka consume pump halts permanently on a Kafka tombstone (null-value record), causing persistent endpoint denial of service.

Impact A CoreWCF service is running and listening on a Kafka topic receiving a null-value record will stop processing new records from that topic. Preconditions The attacker has produce/write permission on a topic that CoreWCF is consuming from. If the broker permits anonymous publishes, no...