CVE-2026-54783 Details
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, CoreWCF WS-Security endorsing and supporting signature verification does not ensure the selected ds:Signature covers the expected Security header target, allowing an attacker with one captured signed SOAP envelope to replay arbitrary service operations as the victim principal. This issue is fixed in versions 1.8.1 and 1.9.1.
A vulnerability exists in CoreWCF, specifically in versions prior to 1.8.1 and 1.9.1, where the WS-Security signature verification process can be manipulated. The issue arises because the verification does not ensure that the selected signature element properly targets the expected Security header components. This flaw enables an attacker to replay captured signed SOAP messages, impersonating the original sender and potentially invoking arbitrary service operations on their behalf.
Users can upgrade to CoreWCF versions 1.8.1 or 1.9.1, both of which include the necessary fix. Instructions for downloading these versions are available on the CoreWCF GitHub Releases page.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 8, 2026CISA-ADP
Assessed Jul 9, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/CoreWCF/CoreWCF/commit/0589692d4b9a41d21b34ac48281e95f6df7f4ce5 | [email protected] | Source CodeVendor |
| https://github.com/CoreWCF/CoreWCF/commit/30aef805270976c42477e3f2a05f4e563d86e247 | [email protected] | Source CodeVendor |
| https://github.com/CoreWCF/CoreWCF/commit/4618f24165ad018ad3ed2636bf8c3bc87d2a3be2 | [email protected] | Source CodeVendor |
| https://github.com/CoreWCF/CoreWCF/releases/tag/v1.8.1 | [email protected] | Release NotesVendor |
| https://github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1 | [email protected] | Release NotesVendor |
| https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-gqv6-pwcg-87r8 | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-294 | Authentication Bypass by Capture-replay | [email protected] |
| CWE-345 | Insufficient Verification of Data Authenticity | [email protected] |
| CWE-347 | Improper Verification of Cryptographic Signature | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| CoreWCF | 1.8.0 (semver) 1.9.0 (semver) |
CPE
Remediation
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| CoreWCF.ConfigurationManager | All versions |
CPE
Remediation
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| CoreWCF.Http | All versions |
CPE
Remediation
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| CoreWCF.Kafka | All versions |
CPE
Remediation
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| CoreWCF.Kafka.Client | All versions |
CPE
Remediation
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| CoreWCF.MSMQ | All versions |
CPE
Remediation
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| CoreWCF.NetFramingBase | All versions |
CPE
Remediation
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| CoreWCF.NetNamedPipe | All versions |
CPE
Remediation
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| CoreWCF.NetTcp | All versions |
CPE
Remediation
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| CoreWCF.Primitives | All versions |
CPE
Remediation
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| CoreWCF.Queue | All versions |
CPE
Remediation
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| CoreWCF.RabbitMQ | All versions |
CPE
Remediation
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| CoreWCF.RabbitMQ.Client | All versions |
CPE
Remediation
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| CoreWCF.Templates | All versions |
CPE
Remediation
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| CoreWCF.UnixDomainSocket | All versions |
CPE
Remediation
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| CoreWCF.WebHttp | All versions |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 10, 2026 | CVE Modified | CISA-ADP |
| Jul 9, 2026 | CVE Modified | CISA-ADP |
| Jul 8, 2026 | New CVE Received | [email protected] |