PT-2026-51071 · Nuget · Corewcf.Primitives

Published 2026-06-19 · Updated 2026-06-19 · CVE-2026-54774

OSV

CVSS v3.1

7.4

High

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Impact

When a service is configured to validate SAML tokens using a method other than X.509 certificate signing, the final signature verification is skipped.

Preconditions

The service is configured to authenticate using SAML tokens and an out of band token resolver (commonly the IssuerTokenResolver of IssuedTokenServiceCredential) holds a non-X.509 SecurityToken whose key identifier the attacker can reference in the assertion’s <KeyInfo> - for example a BinarySecretSecurityToken representing the symmetric proof key issued by a WS-Trust symmetric-key holder-of-key STS.

Patches

Fixed in CoreWCF v1.8.1 and v1.9.1

Workarounds

None

Fix

Improper Verification of Cryptographic Signature

Insufficient Verification of Data Authenticity

Weakness Enumeration

CWE-347

CWE-345

Related Identifiers

CVE-2026-54774

GHSA-RPJ7-HR7H-W6P9

Affected Products

Corewcf.Primitives

References · 3

• https://osv.dev/vulnerability/GHSA-rpj7-hr7h-w6p9 · Vendor Advisory
• https://github.com/CoreWCF/CoreWCF · Note
• https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-rpj7-hr7h-w6p9 · Note