---
title: "CVE-2026-34448: SiYuan: Stored XSS in Attribute View Gallery/Kanban Cover Rendering Allows Arbitrary Command Execution in Desktop Client"
url: https://erroneo.us/security/cve/CVE-2026-34448/
description: "CVE-2026-34448 (github.com/siyuan-note/siyuan/kernel (Go)): SiYuan is a personal knowledge management system. Prior to version 3.6.2, an attacker who can…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-03-31
date_modified: 2026-04-06
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-34448"
kev: false
cvss: 9.1
epss: 0.00726
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-34448: SiYuan: Stored XSS in Attribute View Gallery/Kanban Cover Rendering Allows Arbitrary Command Execution in Desktop Client

**Signal:** Critical, preconditions apply. Severe if exploited, but exploitation needs conditions that may not apply to you. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.7% , percentile 54: FIRST’s model estimates a 0.7% chance of exploitation activity in the next 30 days, higher than 54% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Needs an account (low (any account)). Exposure depends on who can log in.
- Only applies if your dependency tree includes github.com/siyuan-note/siyuan/kernel (Go) <= 3.6.1, fixed in 3.6.2 . Check your lockfile, including transitive dependencies.

## What it is

SiYuan is a personal knowledge management system. Prior to version 3.6.2, an attacker who can place a malicious URL in an Attribute View mAsse field can trigger stored XSS when a victim opens the Gallery or Kanban view with “Cover From -> Asset Field” enabled. The vulnerable code accepts arbitrary http(s) URLs without extensions as images, stores the attacker-controlled string in coverURL, and injects it directly into an attribute without escaping. In the Electron desktop client, the injected JavaScript executes with nodeIntegration enabled and contextIsolation disabled, so the XSS reaches arbitrary OS command execution under the victim’s account. This issue has been patched in version 3.6.2.

## Affected packages

- Go `github.com/siyuan-note/siyuan/kernel` <= 3.6.1 → fixed: 3.6.2

## Affected products (CVE record)

- siyuan-note siyuan: < 3.6.2

## Severity

- GitHub_M CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.0 `CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.73% probability of exploitation activity in the next 30 days; percentile 54.

## Sources

- [GitHub Advisory GHSA-rx4h-526q-4458](https://github.com/advisories/GHSA-rx4h-526q-4458)
- [CVE.org record CVE-2026-34448](https://www.cve.org/CVERecord?id=CVE-2026-34448)
- [NVD entry CVE-2026-34448](https://nvd.nist.gov/vuln/detail/CVE-2026-34448)
- [github.com](https://github.com/siyuan-note/siyuan/security/advisories/GHSA-rx4h-526q-4458)
- [github.com](https://github.com/siyuan-note/siyuan/issues/17246)
- [github.com](https://github.com/siyuan-note/siyuan/releases/tag/v3.6.2)

---
Source page: https://erroneo.us/security/cve/CVE-2026-34448/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt