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Advisory record · GHSA-ff66-236v-p4fg

SiYuan Desktop: Stored XSS in imported .sy.zip content leads to arbitrary command execution

CVSS 8.6 HighEPSS 0.0035 · 28th percentile

Published by the GitHub Advisory Database at 1 Apr 2026, 00:05 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/siyuan-note/siyuan/kernelGo<0.0.0-20260329142331-918d1bd9f9670.0.0-20260329142331-918d1bd9f967
Identifiers
GHSA-ff66-236v-p4fg · CVE-2026-34585 · GO-2026-5357
Weakness (CWE)
CWE-79 · CWE-94
Tags
Published
1 Apr 2026
Updated
25 Jun 2026

Machine-written summary

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

SiYuan Desktop (Go module github.com/siyuan-note/siyuan/kernel) versions before 0.0.0-20260329142331-918d1bd9f967 are affected. A crafted SiYuan .sy.zip file can bypass attribute escaping during import, so a victim who imports the file and views the affected block runs attacker-supplied JavaScript that can execute operating system commands with the user's privileges. Upgrade to 0.0.0-20260329142331-918d1bd9f967 or later. The source gives no workaround other than upgrading.

Written 7 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
8.6 High 3.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0035, the 28th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:07 UTC First seen by agentprime
  2. 31 Oct 2026, 15:07 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.