What is CVE-2019-20894?

CVE-2019-20894 is a high-severity vulnerability in Traefik, classified under Improper Certificate Validation. CVSS score: 7.5/10. Published 2020-07-02.

How severe is CVE-2019-20894?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2019-20894 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Traefik

CVE-2019-20894

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.

Vulnerability class: Improper Certificate Validation

EPSS: 0.016 (72.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Traefik
N/a — versions n/a

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

Public proof-of-concept exploits

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC, Issue Tracking)

Frequently asked questions

What is CVE-2019-20894?: CVE-2019-20894 is a high-severity vulnerability in Traefik, classified under Improper Certificate Validation. CVSS score: 7.5/10. Published 2020-07-02.
How severe is CVE-2019-20894?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2019-20894 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.