Report: CVE-2026-41130 - Craft CMS has a host header injection leading to SSRF via resource-js endpoint - Guide
CVE ID :CVE-2026-41130 Published : April 22, 2026, 12:16 a.m. | 33 minutes ago Description :Craft CMS is a content management system (CMS). In versions on the 4.x branch through 4.17.8 and the 5.x branch through 5.9.14, the `resource-js` endpoint in Craft CMS allows unauthenticated requests to proxy remote JavaScript resources. When `trustedHosts` is not explicitly restricted (default configuration), the application trusts the client-supplied Host header. This allows an attacker to control the derived `baseUrl`, which is used in prefix validation inside `actionResourceJs()`. By supplying a malicious Host header, the attacker can make the server issue arbitrary HTTP requests, leading to Server-Side Request Forgery (SSRF). Versions 4.17.9 and 5.9.15 patch the issue. Severity: 5.5 | MEDIUM Visit the link for more details, such as CVSS details, affected products, timeline, and more...