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Advisory record · GHSA-27qc-m5gf-jv5r

SiYuan Bazaar marketplace renders unescaped package `name` and `version` metadata, allowing stored XSS and Electron code execution

CVSS 9.0 CriticalCriticalEPSS 0.0032 · 24th percentile

Critical, because:

  • CVSS score 9.0: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 13 May 2026, 15:33 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/siyuan-note/siyuan/kernelGo<=0.0.0-20260421031503-96dfe0bea474No fixed version yet
Identifiers
GHSA-27qc-m5gf-jv5r · CVE-2026-45375 · GO-2026-5001
Weakness (CWE)
CWE-79 · CWE-116
Tags
Published
13 May 2026
Updated
8 Jun 2026

Machine-written summary

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

SiYuan Bazaar in github.com/siyuan-note/siyuan/kernel, up to and including 0.0.0-20260421031503-96dfe0bea474, displays package name and version fields without HTML escaping. A package with malicious markup in these fields runs script when a user opens Settings → Marketplace, which in the Electron desktop app can execute OS commands. No fixed version is listed; avoid installing packages from untrusted sources.

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
9.0 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0032, the 24th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:08 UTC First seen by agentprime
  2. 31 Oct 2026, 15:08 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.