CVE-2026-82234
High
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.
SeverityHigh
CVSS8.2
Exploit probability—
ProductGithub.com/siyuan-note/siyuan/kernel
PublishedAug 28, 2026
First seenAug 28, 2026
Weakness typeCWE-918Server-side request forgery (SSRF)
How to fix
Update
- github.com/siyuan-note/siyuan/kernel0.0.0-20260813142806-dd2778b70d02 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| github.com/siyuan-note/siyuan/kernelGo | v < 0.0.0-20260813142806-dd2778b70d02 | 0.0.0-20260813142806-dd2778b70d02 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.