Read the docs
TI-2026-19210 Aliases CVE-2026-23847GHSA-w836-5gpm-7r93

SiYuan Vulnerable to Reflected Cross-Site Scripting (XSS) via /api/icon/getDynamicIcon

Priority MEDIUM 44CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

SiYuan is a personal knowledge management system. Versions prior to 3.5.4 are vulnerable to reflected cross-site scripting in /api/icon/getDynamicIcon due to unsanitized SVG input. The endpoint generates SVG images for text icons (type=8). The content query parameter is inserted directly into the SVG <text> tag without XML escaping. Since the response Content-Type is image/svg+xml, injecting unescaped tags allows breaking the XML structure and executing JavaScript. Version 3.5.4 patches the issue.]

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00314 24th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed siyuan (siyuan-note): 3.5.4github.com/siyuan-note/siyuan/kernel (Go): 0.0.0-20260118021606-5c0cc375b475

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
siyuan-notesiyuanbefore 3.5.43.5.4Patch availableCNA
—github.com/siyuan-note/siyuan/kernel (Go)before 0.0.0-20260118021606-5c0cc375b4750.0.0-20260118021606-5c0cc375b475Patch availableGHSA-w836-5gpm-7r93
  • siyuan Vendorsiyuan-note Affected before 3.5.4 Fixed in 3.5.4 Patch available CNA
  • github.com/siyuan-note/siyuan/kernel (Go) Vendor— Affected before 0.0.0-20260118021606-5c0cc375b475 Fixed in 0.0.0-20260118021606-5c0cc375b475 Patch available GHSA-w836-5gpm-7r93

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:*before 3.5.4Vulnerablesiyuan-note
  • cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:* Versions before 3.5.4 Vulnerable ·siyuan-note

Remediation

  • Fix · CNA siyuan (siyuan-note) Fixed in 3.5.4
  • Fix · GHSA-w836-5gpm-7r93 github.com/siyuan-note/siyuan/kernel (Go) Fixed in 0.0.0-20260118021606-5c0cc375b475 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-23847
  2. 2026-10-03 Alias added: GHSA-w836-5gpm-7r93

References

Exploit 1

Patch 2

Advisory 1

Other 1

  • TI-2026-26050 SiYuan has directory traversal within its publishing service CVSS 3.1CRITICAL 9.8
  • TI-2026-25256 SiYuan: Authorization Bypass Allows Arbitrary SQL Execution via Search API CVSS 3.1CRITICAL 9.8
  • TI-2024-35827 A SQL injection vulnerability was discovered in Siyuan 3.1.11 in /getHistoryItems. CVSS 3.1CRITICAL 9.8
  • TI-2024-35826 A SQL injection vulnerability has been identified in Siyuan 3.1.11 via the ids array parameter in /batchGetBlockAttrs. CVSS 3.1CRITICAL 9.8
  • TI-2024-35825 A SQL injection vulnerability has been identified in Siyuan 3.1.11 via the id parameter at /getAssetContent. CVSS 3.1CRITICAL 9.8
  • TI-2024-35824 A SQL injection vulnerability has been identified in Siyuan 3.1.11 via the notebook parameter in /searchHistory. CVSS 3.1CRITICAL 9.8
See all 54 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences