CVE-2026-55791
- Source
- https://cve.org/CVERecord?id=CVE-2026-55791
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55791.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-55791
- Aliases
- Published
- 2026-07-01T23:13:58.321Z
- Modified
- 2026-07-08T08:13:46.035004780Z
- Severity
-
- 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- Craft CMS: Blind SSRF and Arbitrary JavaScript Injection via Host Header Poisoning in actionResourceJs
- Details
-
Craft CMS is a content management system (CMS). Versions 4.0.0-RC1 and above, prior to 4.18.0 and 5.0.0-RC1, and above, prior to 5.10.0, are vulnerable to Server-Side Request Forgery (SSRF) and Arbitrary JavaScript Injection through the /actions/app/resource-js endpoint. By exploiting the default permissive trustedHosts configuration, an attacker can poison the Host or X-Forwarded-Host header to manipulate the application’s $baseUrl. This bypasses the endpoint’s internal URL validation, forcing the backend Guzzle client to fetch a malicious payload from an attacker-controlled server and reflect it to the client with a Content-Type: application/javascript header. The vulnerability manifests when assetManager.cacheSourcePaths is set to false. This issue has been fixed in versions 4.18.0 and 5.10.0.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-644", "CWE-79", "CWE-918" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55791.json" }- References