CVE-2026-55792 (GCVE-0-2026-55792)
Vulnerability from cvelistv5
Published
2026-07-01 23:20
Modified
2026-07-02 14:49
CWE
  • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Summary
Craft CMS is a content management system (CMS). In versions starting from 4.0.0-RC1 and prior to 4.18.0, and 5.0.0-RC1 and above, prior to 5.10.0, the dataUrl() Twig function is included in Craft’s Twig sandbox allowlist, allowing any control panel user granted the utility:system-messages permission to embed a file-reading payload into system email templates. When those emails are sent, the server reads the target file and returns its contents as a base64-encoded data URL embedded in the email body. The .env file, which typically contains the database password, CRAFT_SECURITY_KEY, and third-party API keys, passes all of Craft’s existing dataUrl() protection checks and is fully exfiltrated. Obtaining CRAFT_SECURITY_KEY enables an attacker to forge session tokens and escalate to full admin account takeover. This issue has been fixed in versions 4.18.0 and 5.10.0.
Impacted products
Vendor Product Version
craftcms cms Version: >= 4.0.0-RC1, < 4.18.0
Version: >= 5.0.0-RC1, < 5.10.0
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Show details on NVD website


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