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Vulnerability record · CVE-2026-73042 · published 15 August 2026

CVE-2026-73042: Cross-site scripting vulnerability

SiYuan before v3.7.4 fails to properly escape database menu metadata in HTML interpolation, allowing stored values to execute script when users open group, view, or field-edit menus. Attackers can inject markup through field descriptions or names that close containing elements and execute arbitrary code via event handlers, reaching Node built-ins due to Electron's insecure configuration.

9.4 CVSS 4.0 Critical EPSS 0.52% · top 58.2% CWE-79 · Cross-site scripting Deferred
9.4CVSS 4.0 base score
0.52%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
26 Aug 2026Last modified by NVD

Description

SiYuan before v3.7.4 fails to properly escape database menu metadata in HTML interpolation, allowing stored values to execute script when users open group, view, or field-edit menus. Attackers can inject markup through field descriptions or names that close containing elements and execute arbitrary code via event handlers, reaching Node built-ins due to Electron's insecure configuration.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-gcm3-qcq3-72rv
https://www.vulncheck.com/advisories/siyuan-before-remote-code-execution-via-menu-metadata

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Source: NIST National Vulnerability Database (record CVE-2026-73042), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.