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CVE-2026-55791 Craft CMS: Blind SSRF and Arbitrary JavaScript Injection via Host Header Poisoning in actionResourceJs

🗓️ 01 Jul 2026 23:13:58Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 4 Views

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/a...

Related
Affected
Refs
[
  {
    "vendor": "craftcms",
    "product": "cms",
    "versions": [
      {
        "version": ">= 5.0.0-RC1, < 5.10.0",
        "status": "affected"
      },
      {
        "version": ">= 4.0.0-RC1, < 4.18.0",
        "status": "affected"
      }
    ]
  }
]

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01 Jul 2026 23:13Current
CVSS 46.9
4