TI-2026-26714 Aliases CVE-2026-34449 GHSA-68p4-j234-43mv

SiYuan: Cross-Origin RCE via Permissive CORS Policy and JavaScript Snippet Injection

HIGH 76CWE-942Published 2026-03-31 · Updated 2026-04-01

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

SiYuan is a personal knowledge management system. Prior to version 3.6.2, a malicious website can achieve Remote Code Execution (RCE) on any desktop running SiYuan by exploiting the permissive CORS policy (Access-Control-Allow-Origin: * + Access-Control-Allow-Private-Network: true) to inject a JavaScript snippet via the API. The injected snippet executes in Electron's Node.js context with full OS access the next time the user opens SiYuan's UI. No user interaction is required beyond visiting the malicious website while SiYuan is running. This issue has been patched in version 3.6.2.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00508 43rd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed siyuan (siyuan-note): 3.6.2github.com/siyuan-note/siyuan/kernel (Go): 3.6.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
siyuan-note	siyuan	before 3.6.2	3.6.2	Patch available	CNA
—	github.com/siyuan-note/siyuan/kernel (Go)	before 3.6.2	3.6.2	Patch available	GHSA-68p4-j234-43mv

siyuan Vendorsiyuan-note Affected before 3.6.2 Fixed in 3.6.2 Patch available CNA
github.com/siyuan-note/siyuan/kernel (Go) Vendor— Affected before 3.6.2 Fixed in 3.6.2 Patch available GHSA-68p4-j234-43mv

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:b3log:siyuan::::::::	before 3.6.2	Vulnerable	siyuan-note

cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:* Versions before 3.6.2 Vulnerable ·siyuan-note

Remediation

Fix · CNA siyuan (siyuan-note) Fixed in 3.6.2
Fix · GHSA-68p4-j234-43mv github.com/siyuan-note/siyuan/kernel (Go) Fixed in 3.6.2 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-34449
2026-10-03 Alias added: GHSA-68p4-j234-43mv
2026-10-25 EPSS moved to the below the 50th percentile

References

Exploit 1

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-68p4-j234-43mv

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-34449

Other 3

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