Vulnerability in Corewcf

CVE-2026-54782

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 SAML 1.1 and SAML 2.0 token validation does not correctly resolve the issuer signing key or require signed toke…

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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-2026-54782?
CVE-2026-54782 is a critical-severity vulnerability in Corewcf, classified under Authentication Bypass by Spoofing. CVSS score: 10.0/10. Published 2026-07-08.
How severe is CVE-2026-54782?
Critical severity. CVSS v3 base score is 10.0 out of 10.