SiYuan Agent Tools SSRF via DNS-Rebinding TOCTOU (Bypass of CheckHostSSRF) — GHSA-X8GV-G2G3-65FJ

Summary

# Security Advisory — SiYuan Agent Tools SSRF via DNS-Rebinding TOCTOU (Bypass of `CheckHostSSRF`) | Field | Value | |---|---| | **Disclosed by** | joysinleung (`joysinleung@gmail.com`) | | **Report date** | 2026-08-13 | | **Product** | SiYuan (思源笔记) — `siyuan-note/siyuan` | | **Go module** | `github.com/siyuan-note/siyuan/kernel` | | **Affected versions** | `<= 3.8.0` (latest release at report time; dynamically…

Timeline

Published by source

2026-10-02

Risk context

• Reported severity or threat level: high.
• Reported CVSS score: 8.2 out of 10.
• Review exposure for the affected product or family: go: github.com/siyuan-note/siyuan/kernel.

Product

go: github.com/siyuan-note/siyuan/kernel

What to do

General, cautious steps (verify details in the official source):

• Prioritize patching or mitigation immediately (treat as actively risky).
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source

Evidence and provenance

Canonical advisory ID

GHSA-X8GV-G2G3-65FJ

Source

GitHub

Vendor

GitHub

Published by source

2026-10-02

Last source activity

2026-10-02

Curated by

hlukh.ch

Related advisories and connections

These advisories are connected by shared CVE, product, vendor, source, or time signals.