CVE-2026-85578

MEDIUM 6.5

SiYuan through 3.8.1 Authorization Bypass via getFile

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-862
Vendor	siyuan-note
Product	siyuan
Published	Sep 4, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

siyuan-note / siyuan

0 ≤ 3.8.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

🔍 alham-rizvi