CVE-2026-27589
February 24, 2026
Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, the local caddy admin API (default listen "127.0.0.1:2019") exposes a state-changing "POST /load" endpoint that replaces the entire running configuration. When origin enforcement is not enabled ("enforce_origin" not configured), the admin endpoint accepts cross-origin requests (e.g., from attacker-controlled web content in a victim browser) and applies an attacker-supplied JSON config. This can change the admin listener settings and alter HTTP server behavior without user intent. Version 2.11.1 contains a fix for the issue.
Affected Packages
https://github.com/caddyserver/caddy.git (GITHUB):
Affected version(s) >=v0.5.0 <v2.11.0-beta.1Fix Suggestion:
Update to version v2.11.0-beta.1github.com/caddyserver/caddy (GO):
Affected version(s) >=v0.5.0 <v2.11.1Fix Suggestion:
Update to version v2.11.1Related Resources (8)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
Exploit Maturity
POC
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Cross-Site Request Forgery (CSRF)
EPSS
Base Score:
0.02
