Vulnerability details

CVE-2026-59833

siyuan-note siyuan

SiYuan: Stored XSS to RCE in SiYuan via a per-attribute URL-scheme sanitizer gap in Lute (form action / SVG xlink:href)

CVSS 4.0

8.6High

Official description

SiYuan is an open-source personal knowledge management system. Prior to 3.7.1, SiYuan renders note and package content to HTML through the Lute engine with sanitization enabled, but Lute's dangerous javascript scheme block does not check form action or SVG xlink:href attributes, allowing stored cross-site scripting in document export-preview and Bazaar package README render paths that can execute OS commands in the Electron desktop renderer. This issue is fixed in versions 3.7.1.

CVSS scores

Score	Version	Source	Vector
8.6High	4.0	CVEProject cvelistV5 (CNA) (GitHub_M)	`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`

Affected products

Vendor	Product	Versions	Source
siyuan-note	siyuan	< 3.7.1	CVEProject cvelistV5 (CNA)

References and advisories

https://github.com/siyuan-note/siyuan/commit/ebe252e61fb93f258d083b9da0fa403679fdf94a x_refsource_MISC
https://github.com/siyuan-note/siyuan/releases/tag/v3.7.1 x_refsource_MISC
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-97xv-3v84-h358 x_refsource_CONFIRM

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Details

Published: 2026-07-10
Last updated: 2026-07-10
State: Published
Assigner (CNA): GitHub_M

Exploit prediction (EPSS)

0.49%

Probability of exploitation in 30 days

42.5%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: Proof of concept
Technical impact: Total

Weaknesses (CWE)

CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-94
Improper Control of Generation of Code ('Code Injection')
CWE-116
Improper Encoding or Escaping of Output