CVE-2026-30869: SiYuan has a Path Traversal in /export Endpoint Allows Arbitrary File Read and Secret Leakage

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-03-10 · updated 2026-06-17
Weakness: CWE-22

Description

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.

Affected products

siyuan-note siyuan: before 3.5.10 — fixed in 3.5.10

How to fix

Upgrade to a fixed version: siyuan-note siyuan 3.5.10. Check the vendor advisory for mitigations.

References

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