Medium severity5.9NVD Advisory· Published Jul 8, 2026· Updated Jul 10, 2026
CVE-2026-54773
CVE-2026-54773
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 signature verification performs a document-wide ds:Signature lookup, allowing an unauthenticated remote attacker to place a SOAP header before wsse:Security and cause WSSecurityOneDotZeroReceiveSecurityHeader to verify an attacker-supplied signature instead of the security header signature. This issue is fixed in versions 1.8.1 and 1.9.1.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
CoreWCF.PrimitivesNuGet | < 1.8.1 | 1.8.1 |
CoreWCF.PrimitivesNuGet | >= 1.9.0, < 1.9.1 | 1.9.1 |
Affected products
1Patches
Vulnerability mechanics
References
7- github.com/advisories/GHSA-jc6x-rj79-w4mxghsaADVISORY
- github.com/CoreWCF/CoreWCF/security/advisories/GHSA-jc6x-rj79-w4mxnvdWEB
- github.com/CoreWCF/CoreWCF/commit/0589692d4b9a41d21b34ac48281e95f6df7f4ce5nvd
- github.com/CoreWCF/CoreWCF/commit/30aef805270976c42477e3f2a05f4e563d86e247nvd
- github.com/CoreWCF/CoreWCF/commit/4618f24165ad018ad3ed2636bf8c3bc87d2a3be2nvd
- github.com/CoreWCF/CoreWCF/releases/tag/v1.8.1nvd
- github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1nvd
News mentions
1- CoreWCF: 13 CVEs Disclosed in a Single Day — Critical SAML Bypass and WS-Security FlawsVypr Intelligence · Jun 19, 2026