Security Advisory

CVE-2026-82234

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-08-28 10:49:24

Last updated 2026-08-28 16:10:07

Assigner VulnCheck

CVSS score 8.4

State PUBLISHED

Description

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.

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