PT-2026-51077 · Nuget · Corewcf.Primitives

Published 2026-06-19 · Updated 2026-06-19 · CVE-2026-54780

OSV

CVSS v3.1

3.7

Low

Base vector

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

Impact

CoreWCF’s WS-Security 1.0 receive pipeline validates the SignatureMethod of an incoming ds:SignedInfo against the configured SecurityAlgorithmSuite, but does not validate the DigestMethod declared on each ds:Reference. As a result, a sender can populate ds:SignedInfo with SignatureMethod values the suite accepts (for example rsa-sha256 under Basic256Sha256) while declaring a per-reference DigestMethod the suite rejects (for example http://www.w3.org/2000/09/xmldsig#sha1). The signature is then verified where it permits SHA-1 digests, and the message is accepted.

Patches

Fixed in CoreWCF v1.8.1 and v1.9.1

Workarounds

None

Fix

Use of a Broken Cryptographic Algorithm

Weakness Enumeration

CWE-757

CWE-327

Related Identifiers

CVE-2026-54780

GHSA-4V55-CPMV-3VCM

Affected Products

Corewcf.Primitives

References · 3

• https://osv.dev/vulnerability/GHSA-4v55-cpmv-3vcm · Vendor Advisory
• https://github.com/CoreWCF/CoreWCF · Note
• https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-4v55-cpmv-3vcm · Note