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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.

PUBLISHED Reserved 2026-06-15 | Published 2026-07-08 | Updated 2026-07-09 | Assigner GitHub_M




MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-248: Uncaught Exception

CWE-754: Improper Check for Unusual or Exceptional Conditions

CWE-755: Improper Handling of Exceptional Conditions

Product status

>= 1.9.0, < 1.9.1
affected

< 1.8.1
affected

References

github.com/...oreWCF/security/advisories/GHSA-m744-jhq9-ppw6

github.com/...ommit/1a229d0d14a07766302f7d14c866889f04a3a624

github.com/...ommit/6d7431ebc0ebe6521ea6d0dbea8982bac3d2bc98

github.com/...ommit/8f95f3ac3c929409e830b5c5659683ef9f6ea6b0

github.com/CoreWCF/CoreWCF/releases/tag/v1.8.1

github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1

cve.org (CVE-2026-54775)

nvd.nist.gov (CVE-2026-54775)

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