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CVE PROGRAM SOURCE RECORD8.4 High

CVE-2026-82234

SiYuan before v3.8.1 SSRF via DNS-Rebinding TOCTOU

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Status
Published
Published
Updated
Assigning organization
VulnCheck

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

siyuan-note siyuan

Default version status: unaffected

  • 0 to < 3.8.1affected
  • 3.8.1unaffected
pkg:golang/github.com/siyuan-note/siyuan/kernel

References