Server-Side Request Forgery (SSRF) in Dify - #VU139844
Published: July 28, 2026
Vulnerability identifier: #VU139844
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-918
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 perform server-side requests to arbitrary URLs.
The vulnerability exists due to server-side request forgery (SSRF) in the API Extension API endpoint when handling API extension configuration requests. A remote user can send a specially crafted request with an attacker-controlled api_endpoint value to perform server-side requests to arbitrary URLs.
The issue can be used to probe internal network services and detect open internal ports.
Remediation
Install security update from vendor's website.