What is CVE-2026-82233?

CVE-2026-82233 is a medium-severity vulnerability in Siyuan-Note Siyuan, classified under Path Traversal. CVSS score: 5.7/10. Published 2026-08-28.

How severe is CVE-2026-82233?

Medium severity. CVSS v3 base score is 5.7 out of 10.

Path Traversal in Siyuan-Note Siyuan

CVE-2026-82233

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.

Vulnerability class: Path Traversal (Directory Traversal)

CVSS v3 metric

CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N.

Affected products

Siyuan-note Siyuan

Weakness classification (CWE)

CWE-22 — Path Traversal

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-82233?: CVE-2026-82233 is a medium-severity vulnerability in Siyuan-Note Siyuan, classified under Path Traversal. CVSS score: 5.7/10. Published 2026-08-28.
How severe is CVE-2026-82233?: Medium severity. CVSS v3 base score is 5.7 out of 10.