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CVE-2026-41949— Dify < 1.14.2 Authorization Bypass via File Preview Endpoint

Quick assessment

Affected
langgenius dify
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.

dify是LangGenius开源的一个 LLM 应用程序开发平台。 dify 1.14.1及之前版本存在安全漏洞，该漏洞源于文件预览端点中的授权绕过问题，可能导致任何认证用户使用文件UUID读取跨所有租户和工作空间的任何上传文档的前3000个字符。攻击者可以访问/console/api/files/{file_id}/preview端点，使用拦截的文件UUID提取文档中的敏感内容。

CVSS 5.9 · Medium EPSS 0.43% · P36

Affected Version Matrix 1

VendorProduct Version RangeStatus
langgenius dify < 1.14.2 affected
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I. Basic Information for CVE-2026-41949

Vulnerability Information
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Vulnerability Title
Dify < 1.14.2 Authorization Bypass via File Preview Endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
Dify before version 1.14.2 contains an authorization bypass vulnerability in the file preview endpoint that allows any authenticated user to read up to 3,000 characters of any uploaded document across all tenants and workspaces using only the file's UUID. Attackers can access the /console/api/files/{file_id}/preview endpoint with an intercepted file UUID to extract sensitive content from documents without ownership or workspace permission verification. NOTE: Dify Cloud allows unauthenticated free self-registration, making account creation trivially accessible to any attacker.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
dify 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
dify是LangGenius开源的一个 LLM 应用程序开发平台。 dify 1.14.1及之前版本存在安全漏洞，该漏洞源于文件预览端点中的授权绕过问题，可能导致任何认证用户使用文件UUID读取跨所有租户和工作空间的任何上传文档的前3000个字符。攻击者可以访问/console/api/files/{file_id}/preview端点，使用拦截的文件UUID提取文档中的敏感内容。
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
langgenius dify 0 ~ 1.14.2 -

II. Public POCs for CVE-2026-41949

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III. Intelligence Information for CVE-2026-41949

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Patches & Fixes for CVE-2026-41949 (3)

Vendor Advisories for CVE-2026-41949 (2)

Security Blog Posts for CVE-2026-41949 (1)

Same Patch Batch · langgenius · 2026-05-18 · 3 CVEs total

CVE-2026-41948 9.4 CRITICAL Dify v1.14.1 Path Traversal via Plugin Daemon Internal API Access
CVE-2026-41947 9.1 CRITICAL Dify < 1.14.2 Authorization Bypass via Trace Configuration Endpoints

IV. Related Vulnerabilities

Same product: dify
Same vendor: langgenius
Same weakness: CWE-639

V. Comments for CVE-2026-41949

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