TI-2026-19214 Aliases CVE-2026-23851 GHSA-94c7-g2fj-7682

SiYuan Vulnerable to Arbitrary File Read via File Copy Functionality

LOW 37CWE-22Published 2026-01-19 · Updated 2026-01-20

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-22 and the CVSS impact.

Summary

SiYuan is a personal knowledge management system. Versions prior to 3.5.4 contain a logic vulnerability in the /api/file/globalCopyFiles endpoint. The function allows authenticated users to copy files from any location on the server's filesystem into the application's workspace without proper path validation. The vulnerability exists in the api/file.go source code. The function globalCopyFiles accepts a list of source paths (srcs) from the JSON request body. While the code checks if the source file exists using filelock.IsExist(src), it fails to validate whether the source path resides within the authorized workspace directory. Version 3.5.4 patches the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00518 44th 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): 0.0.0-20260118092521-f8f4b517077b

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
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

Vendor	Product	Affected versions	Fixed in	Status	Source
siyuan-note	siyuan	before 3.5.4	3.5.4	Patch available	CNA
—	github.com/siyuan-note/siyuan/kernel (Go)	before 0.0.0-20260118092521-f8f4b517077b	0.0.0-20260118092521-f8f4b517077b	Patch available	GHSA-94c7-g2fj-7682

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 0.0.0-20260118092521-f8f4b517077b Fixed in 0.0.0-20260118092521-f8f4b517077b Patch available GHSA-94c7-g2fj-7682

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:b3log:siyuan::::::::	before 3.5.4	Vulnerable	siyuan-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-94c7-g2fj-7682 github.com/siyuan-note/siyuan/kernel (Go) Fixed in 0.0.0-20260118092521-f8f4b517077b Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-23851
2026-10-03 Alias added: GHSA-94c7-g2fj-7682

References

Exploit 1

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-94c7-g2fj-7682

Patch 3

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-23851

Other 1

https://github.com/siyuan-note/siyuan

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

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