VULNERABILITY INTELLIGENCE

CVE-2018-21246

CVSS score9.8 CRITICAL

EPSS probability2.72%

CISA KEVNot currently listed

Published2020-06-15

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

Caddy before 0.10.13 mishandles TLS client authentication, as demonstrated by an authentication bypass caused by the lack of the StrictHostMatching mode.

Weakness classification

CWE-287: Improper Authentication

Primary references

cve@mitre.org — Third Party Advisory
cve@mitre.org — Release Notes, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Release Notes, Third Party Advisory