CVE-2026-32110: b3log siyuan Server-Side Request Forgery (SSRF)

Vulnerability summary

CVE-2026-32110 is a high (CVSS 8.3) Server-Side Request Forgery (SSRF) vulnerability in b3log siyuan. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 32.9% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 11-03-2026
   PublishedVulnerability first disclosed.
2. 12-03-2026
   Last modifiedVulnerability information updated.

Description

SiYuan is a personal knowledge management system. Prior to 3.6.0, the /api/network/forwardProxy endpoint allows authenticated users to make arbitrary HTTP requests from the server. The endpoint accepts a user-controlled URL and makes HTTP requests to it, returning the full response body and headers. There is no URL validation to prevent requests to internal networks, localhost, or cloud metadata services. This vulnerability is fixed in 3.6.0.

• CWE-918Server-Side Request Forgery (SSRF)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.