Vulnerability in Corewcf

CVE-2026-54774

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, SamlSerializer skips final SignatureValue verification when a CoreWCF service validates SAML tokens using a non-X.509 s…

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

  • Corewcf — versions >= 1.9.0, < 1.9.1, < 1.8.1

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-54774?
CVE-2026-54774 is a high-severity vulnerability in Corewcf, classified under Insufficient Verification of Data Authenticity. CVSS score: 7.4/10. Published 2026-07-08.
How severe is CVE-2026-54774?
High severity. CVSS v3 base score is 7.4 out of 10.