SiYuan: Cross-Site WebSocket Hijacking on the admin-only network proxy endpoint (`/ws/network/proxy`) via explicit `CheckOrigin: true` bypass — GHSA-3CC2-H3V6-RQPQ

Summary

**High** ## Package gomod `github.com/siyuan-note/siyuan/kernel` ## Affected versions 3.7.3 ## Patched versions *(none yet — leave blank until a fix is released)* ## Description ### Summary `/ws/network/proxy` is an admin-only WebSocket forward-proxy endpoint (target URL and headers fully attacker-specifiable via query parameters). Its `websocket.Upgrader` explicitly overrides `CheckOrigin` to unconditionally…

Timeline

Published by source

2026-10-02

Risk context

• Reported severity or threat level: low.
• Reported EPSS value: 0.00164.
• 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):

• Review exposure and plan remediation based on risk and environment.
• 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
• CVE Record
• NVD

Evidence and provenance

Canonical advisory ID

GHSA-3CC2-H3V6-RQPQ

Source

GitHub

Vendor

GitHub

Published by source

2026-10-02

Last source activity

2026-10-02

Additional identifiers

CVE-2026-74802

Curated by

hlukh.ch

Related advisories and connections

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