CoreWCF: XML Signature Wrapping in WS-Security endorsing/supporting signature verification allows replay of captured signed messages

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Summary

CVECVE-2026-54783
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-08 23:16:56 UTC
Updated2026-07-08 23:16:56 UTC
DescriptionCoreWCF 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.

Risk And Classification

Primary CVSS: v3.1 7.4 HIGH from [email protected]

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

Problem Types: CWE-294 | CWE-345 | CWE-347 | CWE-294 CWE-294: Authentication Bypass by Capture-replay | CWE-345 CWE-345: Insufficient Verification of Data Authenticity | CWE-347 CWE-347: Improper Verification of Cryptographic Signature

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.4HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
3.1CNADECLARED7.4HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA CoreWCF CoreWCF affected >= 1.9.0, < 1.9.1 Not specified
CNA CoreWCF CoreWCF affected < 1.8.1 Not specified

References

ReferenceSourceLinkTags
github.com/CoreWCF/CoreWCF/security/advisories/GHSA-gqv6-pwcg-87r8 [email protected] github.com
github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1 [email protected] github.com
github.com/CoreWCF/CoreWCF/commit/30aef805270976c42477e3f2a05f4e563d86e247 [email protected] github.com
github.com/CoreWCF/CoreWCF/commit/4618f24165ad018ad3ed2636bf8c3bc87d2a3be2 [email protected] github.com
github.com/CoreWCF/CoreWCF/commit/0589692d4b9a41d21b34ac48281e95f6df7f4ce5 [email protected] github.com
github.com/CoreWCF/CoreWCF/releases/tag/v1.8.1 [email protected] github.com
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