CVE-2026-32110
Server-Side Request Forgery in SiYuan /api/network/forwardProxy
Publication date: 2026-03-11
Last updated on: 2026-03-13
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
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| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| b3log | siyuan | to 3.6.0 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-918 | The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
The vulnerability exists in SiYuan, a personal knowledge management system, in versions prior to 3.6.0. The /api/network/forwardProxy endpoint allows authenticated users to make arbitrary HTTP requests from the server by providing a user-controlled URL. The server then makes the HTTP request to that URL and returns the full response body and headers. There is no validation to restrict URLs, meaning requests can be made to internal networks, localhost, or cloud metadata services.
How can this vulnerability impact me? :
This vulnerability can have serious impacts because it allows an authenticated user to make arbitrary HTTP requests from the server to potentially sensitive internal resources. This can lead to unauthorized access to internal network services, exposure of sensitive data from localhost or cloud metadata services, and potentially further exploitation of the internal environment. The CVSS score of 8.3 indicates a high severity with high impact on confidentiality, integrity, and low impact on availability.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, upgrade SiYuan to version 3.6.0 or later, where the issue with the /api/network/forwardProxy endpoint has been fixed.