CVE-2026-54783

HIGH

CoreWCF WS-Security - SOAP Message Replay

Title source: manual
STIX 2.1

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.

References (6)

Core 6

Scores

CVSS v3 7.4
EPSS 0.0014
EPSS Percentile 4.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-294 CWE-345 CWE-347
Status published
Products (2)
CoreWCF/CoreWCF < 1.8.1
CoreWCF/CoreWCF >= 1.9.0, < 1.9.1
Published Jul 08, 2026
Tracked Since Jul 09, 2026