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CVE-2026-31809: Improper Neutralization of Input During Web Page Generation

🗓️ 10 Mar 2026 00:00:00Reported by Rapid7Type 
rapid7
 rapid7
🔗 www.rapid7.com

Unauthenticated reflected XSS in SiYuan prior to 3.5.10 via SVG sanitizer bypass.

Related
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 跨站脚本漏洞
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
github
Github Security Blog
SiYuan has a SVG Sanitizer Bypass via Whitespace in `javascript:` URI — Unauthenticated XSS
10 Mar 202623:57
–github
nuclei
Nuclei
SiYuan <= v3.5.9 - Cross Site Scripting
25 Sep 202602:05
–nuclei
nvd
NVD
CVE-2026-31809
10 Mar 202621:16
–nvd
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11 Mar 2026 00:00Current
6Medium risk
Vulners AI Score6
CVSS 3.16.1
CVSS 46.4
EPSS0.00569
SSVC
0