---
title: "CVE-2026-92985: SiYuan - Stored XSS"
description: "SiYuan < 3.8.4 contains a stored XSS caused by unescaped bookmark labels imported from notebook files in the dock tree, letting attackers execute scripts with child_process access for command execution, exploit requires crafted .sy notebook files."
url: https://panop.io/threat-heartbeat/CVE-2026-92985/
---

# CVE-2026-92985 SiYuan - Stored XSS

SiYuan < 3.8.4 contains a stored XSS caused by unescaped bookmark labels imported from notebook files in the dock tree, letting attackers execute scripts with child\_process access for command execution, exploit requires crafted .sy notebook files.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.82% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-92985)

## Details

Type

Stored XSS

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Published

17 September 2026

Updated

15 October 2026

Weakness

[CWE-79](https://cwe.mitre.org/data/definitions/79.html)

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-92985](https://nvd.nist.gov/vuln/detail/CVE-2026-92985)
- [https://github.com/siyuan-note/siyuan](https://github.com/siyuan-note/siyuan)
- [https://github.com/siyuan-note/siyuan/blob/v3.8.3/app/src/util/Tree.ts#L134](https://github.com/siyuan-note/siyuan/blob/v3.8.3/app/src/util/Tree.ts#L134)
- [https://github.com/siyuan-note/siyuan/commit/6f093ebe50afc503e2a8b056164293054f8509e7](https://github.com/siyuan-note/siyuan/commit/6f093ebe50afc503e2a8b056164293054f8509e7)
- [https://github.com/siyuan-note/siyuan/security/advisories/GHSA-jhfc-9mcq-8p8v](https://github.com/siyuan-note/siyuan/security/advisories/GHSA-jhfc-9mcq-8p8v)
- [https://www.vulncheck.com/advisories/siyuan-before-3.8.4-cross-site-scripting-via-bookmark-labels](https://www.vulncheck.com/advisories/siyuan-before-3.8.4-cross-site-scripting-via-bookmark-labels)

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- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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