Vulnerability · Published Oct 12, 2026 · Assigned by VulnCheck

CVE-2026-109309SiYuan v3.7.0 before v3.8.6 Arbitrary File Read via Plugin ResponseFile.Path

Medium 6.5

In plain English

A medium-severity path traversal in siyuan from siyuan-note. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.4%top 67.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

SiYuan v3.7.0 before v3.8.6 contains an absolute path traversal vulnerability in the kernel's private plugin HTTP server, which passes a kernel plugin handler's ResponseFile.Path to gin's Context.File without validation. Attackers supplying a malicious kernel plugin can return an absolute path to read any file readable by the SiYuan process, including the API token and conf.json.

Affected products (as reported)

Vendor	Product	Versions
siyuan-note	siyuan	3.7.0 – before 3.8.6

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

References

GitHub Security Advisory (GHSA-phmw-4rgv-r4xv) vendor-advisory
Patch Commit patch
VulnCheck Advisory: SiYuan v3.7.0 before v3.8.6 Arbitrary File Read via Plugin ResponseFile.Path third-party-advisory