CVE-2019-7644
highpriority · track · 40EPSS 0.017 · 77 %ileEUUSEPSS · scored 2026-10-26
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8
weaknesses
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affected products (3)
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advisories (1)
Vendor and ecosystem advisories describing this.
- GHSA-qpvx-gpqm-g98jCritical severity vulnerability that affects Auth0-WCF-Service-JWT2019-04-18ghsa · osvUS
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.
also known as (3)
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sources
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references (4)
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