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CVE-2026-55792— Craft CMS: Sensitive File Disclosure / Server-Side File Read

Quick assessment

Affected
craftcms cms
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

CraftCMS cms是CraftCMS的内容管理系统。 Craft CMS存在信息泄露漏洞，该漏洞源于dataUrl() Twig函数被列入Twig沙盒白名单，允许具有utility:system-messages权限的控制面板用户在系统邮件模板中嵌入文件读取有效载荷，导致服务器读取目标文件并以base64编码的数据URL返回文件内容，从而泄露.env文件中的数据库密码、CRAFT_SECURITY_KEY和第三方API密钥，获取CRAFT_SECURITY_KEY可导致攻击者伪造会话令牌并完全接管管

AI Predicted 8.8 Difficulty: Easy EPSS 0.40% · P32

Affected Version Matrix 2

VendorProduct Version RangeStatus
craftcms cms >= 4.0.0-RC1, < 4.18.0 affected
>= 5.0.0-RC1, < 5.10.0 affected
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I. Basic Information for CVE-2026-55792

Vulnerability Information
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Vulnerability Title
Craft CMS: Sensitive File Disclosure / Server-Side File Read
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Craft CMS 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CraftCMS cms是CraftCMS的内容管理系统。 Craft CMS存在信息泄露漏洞，该漏洞源于dataUrl() Twig函数被列入Twig沙盒白名单，允许具有utility:system-messages权限的控制面板用户在系统邮件模板中嵌入文件读取有效载荷，导致服务器读取目标文件并以base64编码的数据URL返回文件内容，从而泄露.env文件中的数据库密码、CRAFT_SECURITY_KEY和第三方API密钥，获取CRAFT_SECURITY_KEY可导致攻击者伪造会话令牌并完全接管管
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
craftcms cms >= 4.0.0-RC1, < 4.18.0 -

II. Public POCs for CVE-2026-55792

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III. Intelligence Information for CVE-2026-55792

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Patches & Fixes for CVE-2026-55792 (1)

Vendor Advisories for CVE-2026-55792 (1)

Same Patch Batch · craftcms · 2026-07-01 · 9 CVEs total

CVE-2026-50284 Craft CMS: Missing peer-permission check in `AssetsController::actionDeleteFolder` allows
CVE-2026-50280 Craft CMS: Authorization bypass in `entries/move-to-section` via missing target-section sa
CVE-2026-50279 Craft CMS: Authorship spoofing in `entries/save-entry` via pre-check/post-mutation authori
CVE-2026-50283 Craft CMS: Unauthorized Deletion of Source Assets During File Replacement
CVE-2026-55793 Craft CMS: Stored XSS via Structure entry title in table view
CVE-2026-55790 Craft CMS: DOM XSS via GitHub issue title in CraftSupport widget
CVE-2026-55791 Craft CMS: Blind SSRF and Arbitrary JavaScript Injection via Host Header Poisoning in acti
CVE-2026-55794 Craft CMS: Potential authenticated Remote Code Execution via referrer redirect

IV. Related Vulnerabilities

Same product: cms
Same vendor: craftcms
Same weakness: CWE-200

V. Comments for CVE-2026-55792

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