CVE
CVE-2026-82654
SiYuan before v3.8.1 Stored XSS via block name
SiYuan before v3.8.1 fails to properly escape block name, alias, and memo fields in hint, backlink, and breadcrumb rendering functions. Attackers can set a block's name to contain HTML/script tags that execute when another user views documents referencing or displaying that block.
Package Versions Affected
Package Version
patch Availability
No items found.
Automatically patch vulnerabilities without upgrading
Fix Without Upgrading
Detect compatible fix
Apply safe remediation
Fix with a single pull request
CVSS Version
Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.3
-
4.0
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:X/V:X/RE:X/U:X
C
H
U
0
-
C
H
U
8.9
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L
Related Resources
No items found.
References
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82654.json, https://github.com/siyuan-note/siyuan/security/advisories/GHSA-hf87-qh3j-3p88, https://nvd.nist.gov/vuln/detail/CVE-2026-82654, https://www.vulncheck.com/advisories/siyuan-before-3.8.1-stored-xss-via-block-name