High severity7.3NVD Advisory· Published Sep 9, 2026· Updated Sep 9, 2026

CVE-2026-87811

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Siyuan Note/Siyuaninferred2 versions
<3.8.2+ 1 more
- (no CPE)range: <3.8.2
- (no CPE)range: <3.8.2

Patches

Vulnerability mechanics

References

github.com/siyuan-note/siyuan/security/advisories/GHSA-v6wf-r2gr-rrgfnvd
www.vulncheck.com/advisories/siyuan-before-3.8.2-stored-xss-via-notebook-template-pathsnvd

News mentions

No linked articles in our index yet.

cvss	0.474
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000