CVE-2026-82233

MEDIUM 5.7

SiYuan before v3.8.1 Path Traversal via asset.upload

CVSS Score

5.7

EPSS Score

0.0%

EPSS Percentile

0th

SiYuan before v3.8.1 contains a path traversal vulnerability in the asset.upload MCP tool that accepts arbitrary absolute file paths without workspace boundary validation. Attackers can induce the AI Agent to upload sensitive files such as SSH keys or credentials from outside the workspace into the asset directory through prompt injection.

CWE	CWE-22
Vendor	siyuan-note
Product	siyuan
Published	Aug 28, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

siyuan-note / siyuan

0 < 3.8.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/siyuan-note/siyuan/security/advisories/GHSA-p23f-cm6q-2qp8 vulncheck.com: https://www.vulncheck.com/advisories/siyuan-before-3.8.1-path-traversal-via-asset-upload

Credits

🔍 joysinleung