Path Traversal in B3log Siyuan
CVE-2026-30869
SiYuan is a personal knowledge management system. Prior to 3.5.10, a path traversal vulnerability in the /export endpoint allows an attacker to read arbitrary files from the server filesystem. By exploiting double‑encoded traversal sequences, an attacker can access sensitive files such as conf/conf.json, which contains secrets including the API token, cookie signing key, and workspace access authentication code. Leaking these secrets may enable administrative access to the SiYuan kernel API, and in certain deployment scenarios could potentially be chained into remote code execution (RCE). This vulnerability is fixed in 3.5.10.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L.
EPSS exploit prediction
EPSS: 0.011 (65.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 65.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.011 · change: +0.001
Affected products
- B3log Siyuan
- Siyuan-Note Siyuan — versions < 3.5.10
Weakness classification (CWE)
References
- github.com/siyuan-note/siyuan/security/advisories/GHSA-2h2p-mvfx-868w (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-30869?
- CVE-2026-30869 is a critical-severity vulnerability in B3log Siyuan, classified under Path Traversal. CVSS score: 9.3/10. Published 2026-03-10.
- How severe is CVE-2026-30869?
- Critical severity. CVSS v3 base score is 9.3 out of 10.