CRITICAL 9.3 NVD
CVE-2026-82654
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 bloc
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.
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
This critical severity vulnerability with a CVSS score of 9.3 was published on 2026-08-30 via NVD.
Risk Timeline
CVE Disclosed2026-08-30 · -1 days ago
Remediation Resources
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