Path Traversal in B3log Siyuan
CVE-2026-25992
SiYuan is a personal knowledge management system. Prior to 3.5.5, the /api/file/getFile endpoint uses case-sensitive string equality checks to block access to sensitive files. On case-insensitive file systems such as Windows, attackers can bypass restrictions using mixed-case paths and read protected configuration files. This vulnerability is fixed in 3.5.5.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.007 (50.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.007 · change: +0.002
Affected products
- B3log Siyuan
- Siyuan-Note Siyuan — versions < 3.5.5
Weakness classification (CWE)
References
- github.com/siyuan-note/siyuan/security/advisories/GHSA-f72r-2h5j-7639 (Exploit, Vendor Advisory)
- github.com/siyuan-note/siyuan/releases/tag/v3.5.5 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-25992?
- CVE-2026-25992 is a high-severity vulnerability in B3log Siyuan, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-02-10.
- How severe is CVE-2026-25992?
- High severity. CVSS v3 base score is 7.5 out of 10.