Critical severity vulnerability that affects Auth0-WCF-Service-JWT
Auth0 Auth0-WCF-Service-JWT before 1.0.4 leaks the expected JWT signature in an error message when it cannot successfully validate the JWT signature. If this error message is presented to an attacker, they can forge an arbitrary JWT token that will be accepted by the vulnerable application.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| .NET (NuGet) | Auth0-WCF-Service-JWT | < 1.0.4 | 1.0.4 |
References
- CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-209- Platform
- .NET (NuGet)
- Package
Auth0-WCF-Service-JWT- Disclosed
- 18.04.2019
- Updated
- 11.10.2026 11:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-qpvx-gpqm-g98j - CC BY 4.0
Vulnerability history: Auth0-WCF-Service-JWT
All published vulnerabilities of this package (.NET (NuGet)), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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