TI-2026-58708 Aliases CVE-2026-85583 GHSA-g886-mc2m-v27v

SiYuan before v3.8.2 Path Traversal via symlink in file API

LOW 32CWE-59Published 2026-09-04 · Updated 2026-09-14

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-59 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00642 51st percentileScored 2026-11-07

Fix Fixed siyuan (siyuan-note): 3.8.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
siyuan-note	siyuan	before 3.8.2	3.8.2	Patch available	CNA

siyuan Vendorsiyuan-note Affected before 3.8.2 Fixed in 3.8.2 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:b3log:siyuan::::::::	—	—	siyuan-note

cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:* Versions — — ·siyuan-note

Remediation

Fix · CNA siyuan (siyuan-note) Fixed in 3.8.2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-09-04
siyuan-note siyuan 3.8.2
7 records Highest priority Priority HIGH 2 HIGH, 4 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2026-58710 SiYuan before v3.8.2 Unbounded Memory Consumption via ControlConcurrencyPriority HIGH 77
- TI-2026-58709 SiYuan before v3.8.2 Denial of Service via Auth ThrottlePriority HIGH 77
- TI-2026-58707 SiYuan before v3.8.2 Unbounded Session Creation via Basic AuthPriority MEDIUM 64
Show all 7 records →

Timeline

2026-10-02 Threatist record created from CVE-2026-85583
2026-10-03 Alias added: GHSA-g886-mc2m-v27v
2026-10-21 EPSS moved to the 50th–90th percentile

References

Advisory 1

GitHub Security Advisory (GHSA-g7gf-v79m-jwrm)

TI-2026-48492 SiYuan before v3.7.3 SQL Injection via searchDocs CVSS 4.0CRITICAL 9.9
TI-2026-48491 SiYuan before v3.7.3 SQL Injection via searchEmbedBlock CVSS 4.0CRITICAL 9.9
TI-2026-48490 SiYuan before v3.7.3 SQL Injection via fullTextSearchAssetContent CVSS 4.0CRITICAL 9.9
TI-2026-47010 SiYuan before v3.7.2 Unauthenticated Administrator Takeover via MCP CVSS 4.0CRITICAL 10.0
TI-2026-26050 SiYuan has directory traversal within its publishing service CVSS 3.1CRITICAL 9.8
TI-2026-25256 SiYuan: Authorization Bypass Allows Arbitrary SQL Execution via Search API CVSS 3.1CRITICAL 9.8

See all 242 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences