What’s Vulnerable › Vulnerabilities
CVE-2019-20894
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.6% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2020-07-02 · updated 2026-06-17
- Weakness: CWE-295
Description
Traefik 2.x, in certain configurations, allows HTTPS sessions to proceed without mutual TLS verification in a situation where ERR_BAD_SSL_CLIENT_AUTH_CERT should have occurred.
Affected products
- Traefik: from 2.0.0 before 2.0.1 — fixed in 2.0.1
How to fix
Upgrade to a fixed version: Traefik 2.0.1. Check the vendor advisory for mitigations.
References
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