Vulnerability · Published Sep 4, 2026 · Assigned by VulnCheck

CVE-2026-85578SiYuan through 3.8.1 Authorization Bypass via getFile

Medium 6.5

In plain English

A medium-severity missing authorization 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 68.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

SiYuan through 3.8.1 contains an authorization bypass vulnerability in the /api/file/getFile endpoint that allows readers to retrieve files from notebooks explicitly configured as Visible:false. Attackers with reader role can access private workspace files including notebook metadata and internal configuration by knowing the hidden notebook identifier and file path.

Affected products (as reported)

Vendor	Product	Versions
siyuan-note	siyuan	0 – through 3.8.1

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

GitHub Security Advisory (GHSA-8ggq-wq3f-vxrw) vendor-advisory
VulnCheck Advisory: SiYuan through 3.8.1 Authorization Bypass via getFile third-party-advisory