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SiYuan has a SVG Sanitizer Bypass via Whitespace in `javascript:` URI — Unauthenticated XSS

🗓️ 10 Mar 2026 23:57:56Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 33 Views

Unauthenticated XSS in SiYuan SVG sanitizer: whitespace bypasses javascript: prefix.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-31809
10 Mar 202620:58
–attackerkb
circl
Circl
CVE-2026-31809
9 Mar 202608:40
–circl
cnnvd
CNNVD
SiYuan cross-site scripting vulnerabilities
10 Mar 202600:00
–cnnvd
cve
CVE
CVE-2026-31809
10 Mar 202620:58
–cve
cvelist
Cvelist
CVE-2026-31809 SiYuan has a SVG Sanitizer Bypass via Whitespace in `javascript:` URI — Unauthenticated XSS
10 Mar 202620:58
–cvelist
euvd
EUVD
EUVD-2026-10896
10 Mar 202623:57
–euvd
euvd
EUVD
EUVD-2026-10897
10 Mar 202623:57
–euvd
mend
Mend
CVE-2026-31809
10 Mar 202620:58
–mend
nuclei
Nuclei
SiYuan <= v3.5.9 - Cross Site Scripting
27 Oct 202602:09
–nuclei
nvd
NVD
CVE-2026-31809
10 Mar 202621:16
–nvd
Rows per page
Vulners
Node
siyuan-notesiyuanRange<0.0.0-20260310025236-297bd526708fgo

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10 Mar 2026 23:57Current
8.2High risk
Vulners AI Score8.2
CVSS 3.16.1
CVSS 46.4
EPSS0.00517
SSVC
33