CVE-2026-85583CWE-59

CVE-2026-85583

Medium · published September 4, 2026

CVSS v3.1

6.5

EPSS

Percentile

39.5

In the wild

Unconfirmed

What it is

SiYuan versions before v3.8.2 contain a path traversal vulnerability in the reader-accessible file-read endpoint that follows symlinks when opening authorized asset paths. Attackers with reader role can request a logical asset under data/assets/ that is a symlink to a file outside the workspace and receive the target file bytes, bypassing workspace boundary restrictions.

The record

Technical detail

CVSS v3.1: 6.5 · MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0: 7.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS: 0.00476 · 39.5th percentile
Weakness: CWE-59 · Improper Link Resolution Before File Access ('Link Following')
Published: 2026-09-04T16:17Z

References (2)

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-g7gf-v79m-jwrm · [email protected]https://www.vulncheck.com/advisories/siyuan-before-3.8.2-path-traversal-via-symlink-in-file-api · [email protected]

EPSS history

Timeline

06 SEP 03:33Z
EPSS moved — → 0%
epss
04 SEP 11:29Z
SiYuan before v3.8.2 Path Traversal via symlink in file API
cvelistv5