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NVD Vulnerability Details :
CVE-2026-54784
Deferred
More InfoOfficial Page
Source-security-advisories@github.com
View Known Exploited Vulnerability (KEV) details
Published At-08 Jul, 2026 | 23:16
Updated At-10 Jul, 2026 | 05:16

CoreWCF is a port of the service side of Windows Communication Foundation (WCF) to .NET Core. In version 1.9.0, CoreWCF SPNEGO SecurityContextToken negotiation can expose the proof key recovered from the RSTR when TransportWithMessageCredential with Windows client credentials and session establishment are used, allowing an observer to impersonate the authenticated Windows principal and decrypt or forge WS-SecureConversation traffic. This issue is fixed in version 1.9.1.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.17.4HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
N/A
Type: Secondary
Version: 3.1
Base score: 7.4
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Type: N/A
Version:
Base score:
Base severity: N/A
Vector:
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-311Secondarysecurity-advisories@github.com
CWE-523Secondarysecurity-advisories@github.com
CWE ID: CWE-311
Type: Secondary
Source: security-advisories@github.com
CWE ID: CWE-523
Type: Secondary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/CoreWCF/CoreWCF/commit/2afae08b2fa5288428df89e8161116b816cf6b4bsecurity-advisories@github.com
N/A
https://github.com/CoreWCF/CoreWCF/commit/f216aa6929d41dc99cee098b1e69c260ec4c41c7security-advisories@github.com
N/A
https://github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1security-advisories@github.com
N/A
https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-2288-8h3r-cqggsecurity-advisories@github.com
N/A
Hyperlink: https://github.com/CoreWCF/CoreWCF/commit/2afae08b2fa5288428df89e8161116b816cf6b4b
Source: security-advisories@github.com
Resource: N/A
Hyperlink: https://github.com/CoreWCF/CoreWCF/commit/f216aa6929d41dc99cee098b1e69c260ec4c41c7
Source: security-advisories@github.com
Resource: N/A
Hyperlink: https://github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1
Source: security-advisories@github.com
Resource: N/A
Hyperlink: https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-2288-8h3r-cqgg
Source: security-advisories@github.com
Resource: N/A
Change History
0Changes found
Details not found