CVE-2026-82654
9.3
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
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| siyuan-note | siyuan | 0 < 3.8.1 | affected |
| siyuan-note | siyuan | 3.8.1 | unaffected |
Weaknesses
- CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
References
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-hf87-qh3j-3p88
- https://www.vulncheck.com/advisories/siyuan-before-3.8.1-stored-xss-via-block-name
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