High severity7.4NVD Advisory· Published Jul 8, 2026· Updated Jul 10, 2026
CVE-2026-54783
CVE-2026-54783
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.
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-gqv6-pwcg-87r8ghsaADVISORY
- github.com/CoreWCF/CoreWCF/security/advisories/GHSA-gqv6-pwcg-87r8nvdWEB
- 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