GHSA-mgr7-5782-6jh9
The Umbraco Heartcore headless client library uses a vulnerable Refit dependency package
Impact
The Heartcore headless client library depends on Refit to assist in making HTTP requests to Heartcore public APIs. Refit recently published an advisory regarding a CRLF injection vulnerability whereby it is possible for a malicious user to smuggle additional headers or potentially body content into a request.
This shouldn't affect Heartcore client library usage as the vulnerable method - HttpHeaders.TryAddWithoutValidation - is not used. However, since Refit is a transient dependency for applications using this library, then any users making direct use of Refit could be vulnerable.
Patches
The vulnerable version of Refit has been upgraded to a secure version, as of Umbraco.Headless.Client.Net version 1.5.0, available on Nuget.
Workarounds
If calling Refit from your own code, set any necessary HTTP headers without use of HttpHeaders.TryAddWithoutValidation.
References
See the original Refit advisory for further info.
What each source reports
GitHub AdvisoriesNo score
The Umbraco Heartcore headless client library uses a vulnerable Refit dependency package
Impact
The Heartcore headless client library depends on Refit to assist in making HTTP requests to Heartcore public APIs. Refit recently published an advisory regarding a CRLF injection vulnerability whereby it is possible for a malicious user to smuggle additional headers or potentially body content into a request.
This shouldn't affect Heartcore client library usage as the vulnerable method - HttpHeaders.TryAddWithoutValidation - is not used. However, since Refit is a transient dependency for applications using this library, then any users making direct use of Refit could be vulnerable.
Patches
The vulnerable version of Refit has been upgraded to a secure version, as of Umbraco.Headless.Client.Net version 1.5.0, available on Nuget.
Workarounds
If calling Refit from your own code, set any necessary HTTP headers without use of HttpHeaders.TryAddWithoutValidation.
References
See the original Refit advisory for further info.
- Record
GHSA-mgr7-5782-6jh9- Weakness
- CWE-93, CWE-1395
- Updated
- 2026-11-02
OSVNo score
The Umbraco Heartcore headless client library uses a vulnerable Refit dependency package
Impact
The Heartcore headless client library depends on Refit to assist in making HTTP requests to Heartcore public APIs. Refit recently published an advisory regarding a CRLF injection vulnerability whereby it is possible for a malicious user to smuggle additional headers or potentially body content into a request.
This shouldn't affect Heartcore client library usage as the vulnerable method - HttpHeaders.TryAddWithoutValidation - is not used. However, since Refit is a transient dependency for applications using this library, then any users making direct use of Refit could be vulnerable.
Patches
The vulnerable version of Refit has been upgraded to a secure version, as of Umbraco.Headless.Client.Net version 1.5.0, available on Nuget.
Workarounds
If calling Refit from your own code, set any necessary HTTP headers without use of HttpHeaders.TryAddWithoutValidation.
References
See the original Refit advisory for further info.
- Record
GHSA-mgr7-5782-6jh9- Weakness
- CWE-1395, CWE-93
- Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
Umbraco.Headless.Client.NetNuGet | through 1.4.1 | 1.5.0 |
Umbraco.Headless.Client.NetNuGet | before 1.5.0, plus listed versions 0.9.0.27621-RC0.9.0.27622-RC0.9.0.27906-RC0.9.0.28041-RC0.9.0.28188-RC Show 25 moreShow less0.9.0.28348-RC0.9.0.28847-RC0.9.0.28874-RC0.9.0.29124-RC0.9.0.29125-RC0.9.0.29126-RC0.9.0.29224-RC1.0.0.297531.0.0.31151-RC1.0.0.31370-RC1.1.0.31374-RC1.1.0.31402-RC1.1.0.314061.1.0.31470-RC1.1.11.2.01.2.11.3.01.3.11.3.21.3.31.3.41.3.51.4.01.4.1 | 1.5.0 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | GitHub Advisories, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
GHSA-mgr7-5782-6jh9 is a vulnerability with no CVSS score yet in Umbraco.Headless.Client.Net, published January 13, 2025. No source lists public exploit code. Fixed in Umbraco.Headless.Client.Net 1.5.0.