What’s Vulnerable › Vulnerabilities

CVE-2026-41950: Dify < 1.14.0 Authorization Bypass via File UUID

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-05-05 · updated 2026-07-24
• Weakness: CWE-639

Description

Dify before version 1.14.0 contains an authorization bypass vulnerability that allows authenticated users to read the full contents of files uploaded by other users within the same tenant by supplying an arbitrary file UUID in the files array of a chat-messages request. Attackers can exploit insufficient permission verification in the chat-messages endpoints to access files without ownership validation, bypassing workspace separation and signed URL protections to retrieve sensitive file contents through workflow processing.

Affected products

• langgenius dify: before 1.14.0 — fixed in 1.14.0

How to fix

Upgrade to a fixed version: langgenius dify 1.14.0. Check the vendor advisory for mitigations.

References

• https://github.com/langgenius/dify/releases/tag/1.14.0
• https://huntr.com/bounties/181136ec-d957-4b75-8ea7-6fa7b8abd01d
• https://www.vulncheck.com/advisories/dify-authorization-bypass-via-file-uuid
• https://www.zafran.io/resources/difytap-zafran-discovers-how-attackers-can-silently-wiretap-ai-data-across-tenants-on-a-platform-powering-1m-apps
• https://huntr.com/bounties/181136ec-d957-4b75-8ea7-6fa7b8abd01d

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