CVE-2026-27589

MEDIUM EPSS 6.2%
Published Feb 24, 20264mo ago · Modified Feb 25, 20264mo ago
6.9 CVSS 4.0
Medium
Find Similar
Published Feb 24, 2026 4mo ago
Last Modified Feb 25, 2026 4mo ago

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.

CVSS Details

Base Score
6.9
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
6.2% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 1

CWE-352 Cross-Site Request Forgery (CSRF) Authentication

Affected Products 1

VendorProductVersionRange
caddyservercaddy* <2.11.1

References 4

  • github.com https://github.com/caddyserver/caddy/releases/tag/v2.11.1
    Release Notes
  • github.com https://github.com/caddyserver/caddy/security/advisories/GHSA-879p-475x-rqh2
    ExploitMitigationVendor Advisory
  • github.com https://github.com/user-attachments/files/25079818/poc.zip
    Exploit
  • github.com https://github.com/user-attachments/files/25079820/PR_DESCRIPTION.md
    ExploitThird Party Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.