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

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-04 · updated 2026-10-08
Weakness: CWE-862

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

siyuan-note siyuan: through 3.8.1

References

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-8ggq-wq3f-vxrw
https://www.vulncheck.com/advisories/siyuan-through-3.8.1-authorization-bypass-via-getfile

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