CVE-2026-54782criticalCWE-290CWE-347

CVE-2026-54782: fallo crítico en CoreWCF

CoreWCF: Authentication bypass in CoreWCF SAML 1.1 / 2.0 token signature validation

Publicada el · Actualizada el

Seguir esta CVE+ Monitorear CoreWCF+ Monitorear CoreWCF.Primitives

Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.

28Vexday Risk Score

Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.

ssvc Trackcvss 10epss 0.4%
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 tokens when IdentityConfiguration is used with federated bindings, allowing an unauthenticated remote attacker to impersonate any principal the trusted STS could issue. This issue is fixed in versions 1.8.1 and 1.9.1.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Productos afectados
CoreWCF · CoreWCF
CVEs relacionadas — CoreWCF

En el mismo producto, de las más peligrosas a las menos.

CVE-2026-54772HIGHCoreWCF: Pre-authentication infinite-loop CPU exhaustion in CoreWCF net.tcp / net.pipe / net.uds framing handshakeEPSS 0.8%CVE-2026-54775MEDIUMCoreWCF: Kafka consume pump halts permanently on a Kafka tombstone (null-value record), causing persistent endpoint denial of service.EPSS 0.6%CVE-2024-28252HIGHCoreWCF NetFraming based services can leave connections open when they should be closedEPSS 0.6%CVE-2026-54779MEDIUMCoreWCF: SAML token replay protection is inoperativeEPSS 0.4%CVE-2026-54773MEDIUMCoreWCF: WS-Security signature substitution via document-wide Signature lookupEPSS 0.4%CVE-2026-54784HIGHCoreWCF: SPNEGO SecurityContextToken proof key wrapped without confidentialityEPSS 0.3%