SSRF in B3log Siyuan
CVE-2026-32110
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
EPSS: 0.003 (20.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L.
Affected products
- B3log Siyuan
- Siyuan-note Siyuan — versions < 3.6.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-32110?
- CVE-2026-32110 is a high-severity vulnerability in B3log Siyuan, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.3/10. Published 2026-03-11.
- How severe is CVE-2026-32110?
- High severity. CVSS v3 base score is 8.3 out of 10.