Is CVE-2019-7644 actively exploited?

No active exploitation of CVE-2019-7644 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2019-7644 be exploited remotely?

Yes. CVE-2019-7644 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2019-7644?

CVE-2019-7644 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2019-7644

CRITICAL

CVE-2019-7644

CWE-209Published: April 11, 2019· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2019-7644 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.