CVE-2026-31809
SiYuan has a SVG Sanitizer Bypass via Whitespace in `javascript:` URI — Unauthenticated XSS in github.com/siyuan-note/siyuan/kernel
EPSS 0.50%
Description
SiYuan has a SVG Sanitizer Bypass via Whitespace in `javascript:` URI — Unauthenticated XSS in github.com/siyuan-note/siyuan/kernel
How to fix CVE-2026-31809
To remediate CVE-2026-31809, upgrade the affected package to a fixed version below.
- Go/github.com/siyuan-note/siyuan/kernel—upgrade to 0.0.0-20260310025236-297bd526708f or later
- Go/github.com/siyuan-note/siyuan/kernel—upgrade to 0.0.0-20260310025236-297bd526708f or later
Is CVE-2026-31809 being exploited?
Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 0.0.0-20260310025236-297bd526708f
- from 0, < 0.0.0-20260310025236-297bd526708f
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N |