GHSA-jc6x-rj79-w4mx

Source

https://github.com/advisories/GHSA-jc6x-rj79-w4mx

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-jc6x-rj79-w4mx/GHSA-jc6x-rj79-w4mx.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-jc6x-rj79-w4mx

Aliases

CVE-2026-54773

Published

2026-06-19T20:46:43Z

Modified

2026-06-19T21:00:16.054426590Z

Severity

5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator

Summary

CoreWCF: WS-Security signature substitution via document-wide Signature lookup

Details

Impact

An unauthenticated remote attacker who can place a SOAP header lexically before wsse:Security can embed a ds:Signature of their choosing inside that header and cause the server to verify the attacker-supplied signature instead of the one carried in the security header.

Preconditions

Exploitation requires the endpoint be configured with an endorsing supporting token binding, and the attacker constructs a ds:Signature whose KeyInfo resolves through the receive-side token resolver to a key under the attacker’s control. Both are conditions outside the attacker’s direct control on a generic deployment.

Patches

Fixed in CoreWCF v1.8.1 and v1.9.1

Workarounds

Use a security token resolver that only accepts references to issuer-pinned X.509 chains (the default when expecting a static set of signing certificates).

Database specific

{
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-19T20:46:43Z",
    "nvd_published_at": null,
    "severity": "MODERATE",
    "cwe_ids": [
        "CWE-347"
    ]
}

References

Affected packages

NuGet / CoreWCF.Primitives

Package

Name: CoreWCF.Primitives; View open source insights on deps.dev
Purl: pkg:nuget/CoreWCF.Primitives

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1.8.1

Affected versions

0.*

0.1.0-preview

0.1.0-preview-2

0.1.0

0.2.0

0.2.1

0.3.0

0.3.1

0.3.2

0.4.0

1.*

1.0.0-preview1

1.0.0-preview2

1.0.0

1.0.1

1.0.2

1.1.0

1.1.1

1.2.0

1.2.1

1.3.0

1.3.1

1.3.2

1.4.0-preview1

1.4.0

1.4.1

1.4.2

1.5.0-preview1

1.5.0

1.5.1

1.5.2

1.6.0

1.7.0

1.8.0

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-jc6x-rj79-w4mx/GHSA-jc6x-rj79-w4mx.json"