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Vulnerability record · CVE-2026-82653 · published 30 August 2026

CVE-2026-82653: Cross-site scripting vulnerability

SiYuan before v3.8.1 contains a stored cross-site scripting vulnerability in confirmDialog() where unescaped package names and notebook names are interpolated directly into innerHTML assignments. Attackers can submit malicious bazaar packages with HTML/script payloads in the name field that execute in users' browsers when uninstalling packages or unlocking encrypted notebooks.

9.3 CVSS 4.0 Critical EPSS 0.37% · top 72.1% CWE-79 · Cross-site scripting Deferred
9.3CVSS 4.0 base score
0.37%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
2 Sep 2026Last modified by NVD

Description

SiYuan before v3.8.1 contains a stored cross-site scripting vulnerability in confirmDialog() where unescaped package names and notebook names are interpolated directly into innerHTML assignments. Attackers can submit malicious bazaar packages with HTML/script payloads in the name field that execute in users' browsers when uninstalling packages or unlocking encrypted notebooks.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L/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-hvwp-43j9-4xgf
https://www.vulncheck.com/advisories/siyuan-before-3.8.1-stored-xss-via-confirmdialog
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-hvwp-43j9-4xgf

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Source: NIST National Vulnerability Database (record CVE-2026-82653), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.