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CVE-2026-54775 — Vulnerability in CoreWCF.Kafka — CVE Details

MEDIUM

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

Published June 19, 2026Updated June 19, 2026Source: osv

Summary

### 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 authentication is required. ### Patches Fixed in CoreWCF v1.8.1 and v1.9.1 ### Workarounds Only allow authenticated writes to a topic

Advisory Timeline

  • First published June 19, 2026 (115 days ago).
  • Last revised June 19, 2026 — 0 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

NuGet
Update CoreWCF.Kafka to 1.9.1 or later
dotnet add package CoreWCF.Kafka --version 1.9.1
NuGet
Update CoreWCF.Kafka to 1.8.1 or later
dotnet add package CoreWCF.Kafka --version 1.8.1

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (2)

Affects 1 ecosystem: nuget (1).

PackageEcosystemAffectedFixed In
CoreWCF.Kafka
nuget
1.9.01.9.1
CoreWCF.Kafka
nuget
1.4.0, 1.4.1, 1.4.2, 1.5.0 (+6 more)1.8.1

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 6.5 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

References

Frequently Asked Questions

What is CVE-2026-54775?
CoreWCF: Kafka consume pump halts permanently on a Kafka tombstone (null-value record), causing persistent endpoint denial of service. This vulnerability has been assigned a severity rating of MEDIUM (CVSS score: 6.5/10).
How do I check if my project is affected by CVE-2026-54775?
CVE-2026-54775 affects CoreWCF.Kafka. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-54775 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
6.5

Exploitation requires specific conditions or has limited impact. Remediate within weeks.

Also Known As

GHSA-m744-jhq9-ppw6

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