CVE-2026-31809
Medium · 6.1CVSS
6.1
EPSS
0.6%
Published
Mar 10, 2026
CISA due date
—
The record
SiYuan is a personal knowledge management system. Prior to 3.5.10, SiYuan's SVG sanitizer (SanitizeSVG) checks href attributes for the javascript: prefix using strings.HasPrefix(). However, inserting ASCII tab (	), newline ( ), or carriage return ( ) characters inside the javascript: string bypasses this prefix check. Browsers strip these characters per the WHATWG URL specification before parsing the URL scheme, so the JavaScript still executes. This allows an attacker to inject executable JavaScript into the unauthenticated /api/icon/getDynamicIcon endpoint, creating a reflected XSS. This is a second bypass of the fix for CVE-2026-29183 (fixed in v3.5.9). This vulnerability is fixed in 3.5.10.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| openSUSE:Leap 15.6 | govulncheck-vulndb | 0 | 0.0.20260317T205859-150000.1.152.1 |
Related vulnerabilities
- CVE-2026-33990 Docker Model Runner (DMR) is software used to manage, run, and deploy AI models using… Also affects govulncheck-vulndb
- CVE-2026-34204 MinIO is a high-performance object storage system. Also affects govulncheck-vulndb
- CVE-2026-34041 act is a project which allows for local running of github actions. Also affects govulncheck-vulndb
- CVE-2026-34042 act is a project which allows for local running of github actions. Also affects govulncheck-vulndb
- CVE-2026-34040 Moby is an open source container framework. Also affects govulncheck-vulndb
- CVE-2026-33997 Moby is an open source container framework. Also affects govulncheck-vulndb
- CVE-2026-27018 Gotenberg is an API for converting document formats. Also affects govulncheck-vulndb
- CVE-2026-33026 Nginx UI is a web user interface for the Nginx web server. Also affects govulncheck-vulndb