Description

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.

INFO

Published Date :

2026-02-24T16:30:52.016Z

Last Modified :

2026-02-27T20:51:24.110Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-27589 vulnerability.

Vendors Products
Caddyserver
  • Caddy
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-27589.

URL Resource
https://github.com/caddyserver/caddy/releases/tag/v2.11.1 cve-icon cve-icon
https://github.com/caddyserver/caddy/security/advisories/GHSA-879p-475x-rqh2 cve-icon cve-icon
https://github.com/user-attachments/files/25079818/poc.zip cve-icon cve-icon
https://github.com/user-attachments/files/25079820/PR_DESCRIPTION.md cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
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Privileges Required
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SS Confidentiality
SS Integrity
SS Availability
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact