CVE-2026-41130

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.

• CWE-918

• https://github.com/craftcms/cms/commit/ebe7e85f1c89700d64332f72492be2e9a594e783
• https://github.com/craftcms/cms/security/advisories/GHSA-95wr-3f2v-v2wh
• https://github.com/craftcms/cms/security/advisories/GHSA-95wr-3f2v-v2wh

Published

Apr 22, 2026

Last Modified

Jun 17, 2026

Status

Deferred

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