HIGH 8.4 NVD
CVE-2026-87811
SiYuan before v3.8.2 inserts persisted notebook template paths into HTML input value attributes without proper attribute encoding. Attackers can craft malicious
SiYuan before v3.8.2 inserts persisted notebook template paths into HTML input value attributes without proper attribute encoding. Attackers can craft malicious template paths that break out of the attribute context and execute JavaScript when a victim opens notebook configuration, enabling same-origin API requests and application state manipulation.
References
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-v6wf-r2gr-rrgf
- https://www.vulncheck.com/advisories/siyuan-before-3.8.2-stored-xss-via-notebook-template-
This high severity vulnerability with a CVSS score of 8.4 was published on 2026-09-09 via NVD.
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