Medium 6.5Published Jul 8, 2026

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

Updated under an hour ago (Oct 27, 2026, 1:40 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-248, CWE-754, CWE-755
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Jul 9, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

CoreWCF CoreWCF corewcf:corewcf (from the name)	from 1.9.0, < 1.9.1; before 1.8.1	CNA record

References

References

https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-m744-jhq9-ppw6	x-refsource-confirm
https://github.com/CoreWCF/CoreWCF/commit/1a229d0d14a07766302f7d14c866889f04a3a624	x-refsource-misc
https://github.com/CoreWCF/CoreWCF/commit/6d7431ebc0ebe6521ea6d0dbea8982bac3d2bc98	x-refsource-misc
https://github.com/CoreWCF/CoreWCF/commit/8f95f3ac3c929409e830b5c5659683ef9f6ea6b0	x-refsource-misc
https://github.com/CoreWCF/CoreWCF/releases/tag/v1.8.1	x-refsource-misc
https://github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.