CVE-2019-7644 json
Critical severity vulnerability that affects Auth0-WCF-Service-JWT
published 2019-04-11 7 y ago modified 2026-06-17 4 mo ago also GHSA-qpvx-gpqm-g98j , EUVD-2019-0429
- cvss
- 9.8
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.7%
- EPSS 1.7% chance of exploitation in 30 days, percentile 77%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- nuget Auth0-WCF-Service-JWT 1.0.4
- auth0 auth0-wcf-service-jwt 1.0.4
Exploit prediction
1.71% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| GitHub | 3.0 | 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| nuget | Auth0-WCF-Service-JWT | <1.0.4 |
1.0.4 |
Classification
- Weakness
-
- CWE-209 Generation of Error Message Containing Sensitive Information
References
-
auth0.com
/docs/security/bulletins/cve-2019-7644
web, patch, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2019-7644
advisory
-
github.com
/advisories/GHSA-qpvx-gpqm-g98j
advisory
Sources
- CVE List CVE-2019-7644
- GitHub Advisory GHSA-qpvx-gpqm-g98j
- NVD CVE-2019-7644
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