CVE-2026-82234

Fixed upstream EPSS <1%CVSS 8.2

SiYuan versions before v3.8.1 contain a server-side request forgery vulnerability in the http_request and web_fetch agent tools that perform DNS resolution only at guard time without validating the connect-time resolution. Attackers can use DNS rebinding to answer the guard resolution with a public IP and the connect resolution with a private or metadata IP, bypassing the SSRF defense to access cloud instance metadata and internal services.

Published 2026-08-28 · CVE record · OSV

Products: siyuan-note siyuan

Fixed upstream