VULNERABILITY INTELLIGENCE
CVE-2026-54783
CVSS score7.4 HIGH
EPSS probability0.19%
CISA KEVNot currently listed
Published2026-07-08
Last modified2026-07-10
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Description
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.
Weakness classification
- CWE-294: Authentication Bypass by Capture-replay
- CWE-345: Insufficient Verification of Data Authenticity
- CWE-347: Improper Verification of Cryptographic Signature