by Kastro
Paper/Archive/CVE-2026-65606

CVE-2026-65606

siyuan-note siyuan — SiYuan before v3.7.2 Cross-Site Scripting to RCE

EPSS 0.8%public exploitCVSS 9.6
critical.is priorityof 100
50
CVSS 9.6 (CNA)9.6 / 10 × 3028.8Not in CISA KEV+300.0EPSS percentile 56.3.563 × 2011.3Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

SiYuan before v3.7.2 contains a cross-site scripting vulnerability in the siyuan:// protocol handler. When a siyuan://plugins/<name> link references a name that is not an installed plugin, the application opens a custom tab and inserts the link's icon parameter into the tab header via innerHTML without escaping it (app/src/layout/Tab.ts), allowing injection of an <img onerror=...> element. Because the SiYuan Desktop renderer runs with nodeIntegration:true, the injected JavaScript can access Node's require and call require('child_process').execSync(...), escalating the cross-site scripting into arbitrary operating-system command execution.

Affected

ProductAffectedFixed inSource
siyuan< 3.7.23.7.2CNA

Scores by source

VulnCheck (CNA)9.6CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
VulnCheck (CNA)9.4CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: total

References

exploitgithub.com/siyuan-note/siyuan/security/advisories/GHSA-wp64-x7qh-h728patchgithub.com/siyuan-note/siyuan/commit/41f2861c87575ff5ac4b50a0520b1a4fe55b4a70writeupvulncheck.com/advisories/siyuan-before-cross-site-scripting-to-rce