Improper access control in Dify - #VU139797
Published: July 27, 2026
Vulnerability identifier: #VU139797
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: LangGenius
Affected software:
Dify
Dify
Detailed vulnerability description
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to improper access control in the /use-check endpoint when handling requests for external API usage checks. A remote user can send a request for another tenant's external API template UUID to disclose sensitive information.
The issue can reveal whether a target external API template is in use and how many datasets reference it across tenants.
Remediation
Install security update from vendor's website.