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TI-2019-05387 Aliases CVE-2019-7644GHSA-qpvx-gpqm-g98j

Auth0 Auth0-WCF-Service-JWT before 1.0.4 leaks the expected JWT signature in an error…

Priority MEDIUM 45CWE-209Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and GitHub. Impact type from CWE-209.

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.

Why it matters now

EPSS 0.01706 77th percentileScored 2026-11-07
Fix Fixed Auth0-WCF-Service-JWT (NuGet): 1.0.4

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
—Auth0-WCF-Service-JWT (NuGet)before 1.0.41.0.4Patch availableGHSA-qpvx-gpqm-g98j
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • Auth0-WCF-Service-JWT (NuGet) Vendor— Affected before 1.0.4 Fixed in 1.0.4 Patch available GHSA-qpvx-gpqm-g98j

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:auth0:auth0-wcf-service-jwt:*:*:*:*:*:*:*:*before 1.0.4Vulnerableauth0
  • cpe:2.3:a:auth0:auth0-wcf-service-jwt:*:*:*:*:*:*:*:* Versions before 1.0.4 Vulnerable ·auth0

Remediation

  • Fix · GHSA-qpvx-gpqm-g98j Auth0-WCF-Service-JWT (NuGet) Fixed in 1.0.4 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-7644
  2. 2026-10-03 Alias added: GHSA-qpvx-gpqm-g98j

References

Patch 1

Advisory 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences