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Advisory record · GHSA-3cc2-h3v6-rqpq

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

CVSS 7.1 HighEPSS 0.0016 · 5th percentile

Published by the GitHub Advisory Database at 2 Oct 2026, 22:46 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/siyuan-note/siyuan/kernelGo<0.0.0-20260803045322-cb67e0b4fab50.0.0-20260803045322-cb67e0b4fab5
Identifiers
GHSA-3cc2-h3v6-rqpq · CVE-2026-74802 · GO-2026-6650
Weakness (CWE)
CWE-346 · CWE-352 · CWE-918
Tags
Published
2 Oct 2026
Updated
7 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

SiYuan kernel (github.com/siyuan-note/siyuan/kernel) version 3.7.3 has an admin-only network proxy WebSocket endpoint that disables origin checking. A user with an active admin session who visits a malicious website may be exposed to the kernel proxying network traffic to an attacker-chosen target, though the source says exploitability depends on browser and cookie SameSite behavior. No fix is listed.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.1 High 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:L/SI:L/SA:N CNA (VulnCheck)
  • CISA KEV Not listed.
  • EPSS 0.0016, the 5th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:12 UTC First seen by agentprime
  2. 31 Oct 2026, 14:12 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.