CVE-2026-54783
CoreWCF: XML Signature Wrapping in WS-Security endorsing/supporting signature verification allows replay of captured signed messages
CVSS Score
7.4
EPSS Score
0.1%
EPSS Percentile
4th
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.
| CWE | CWE-294 CWE-345 CWE-347 |
| Vendor | corewcf |
| Product | corewcf |
| Published | Jul 8, 2026 |
| Last Updated | Jul 10, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
CoreWCF / CoreWCF
>= 1.9.0, < 1.9.1 < 1.8.1
References
github.com: https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-gqv6-pwcg-87r8 github.com: https://github.com/CoreWCF/CoreWCF/commit/0589692d4b9a41d21b34ac48281e95f6df7f4ce5 github.com: https://github.com/CoreWCF/CoreWCF/commit/30aef805270976c42477e3f2a05f4e563d86e247 github.com: https://github.com/CoreWCF/CoreWCF/commit/4618f24165ad018ad3ed2636bf8c3bc87d2a3be2 github.com: https://github.com/CoreWCF/CoreWCF/releases/tag/v1.8.1 github.com: https://github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1