CVE-2026-23850

HIGH EPSS 40.3%
Published Jan 19, 20265mo ago · Modified Jun 17, 20262w ago
7.8 CVSS 4.0
High
Find Similar
Published Jan 19, 2026 5mo ago
Last Modified Jun 17, 2026 2w ago

Description

SiYuan is a personal knowledge management system. In versions prior to 3.5.4, the markdown feature allows unrestricted server side html-rendering which allows arbitrary file read (LFD). Version 3.5.4 fixes the issue.

CVSS Details

Base Score
7.8
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
40.3% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-22 Path Traversal Resource Mgmt

Affected Products 1

VendorProductVersionRange
b3logsiyuan* <3.5.4

References 6

  • github.com https://github.com/siyuan-note/siyuan/blob/master/kernel/model/file.go#L1035
    Product
  • github.com https://github.com/siyuan-note/siyuan/blob/v3.4.2/kernel/api/filetree.go#L799-L886
    Product
  • github.com https://github.com/siyuan-note/siyuan/commit/b2274baba2e11c8cf8901b0c5c871e5b27f1f6dd
    Patch
  • github.com https://github.com/siyuan-note/siyuan/commit/f8f4b517077b92c90c0d7b51ac11be1b34b273ad
    Patch
  • github.com https://github.com/siyuan-note/siyuan/issues/16860
    Issue TrackingPatch
  • github.com https://github.com/siyuan-note/siyuan/security/advisories/GHSA-cv54-7wv7-qxcw
    ExploitPatchVendor Advisory

Remediation

  • github.com https://github.com/siyuan-note/siyuan/commit/b2274baba2e11c8cf8901b0c5c871e5b27f1f6dd
    Patch
  • github.com https://github.com/siyuan-note/siyuan/commit/f8f4b517077b92c90c0d7b51ac11be1b34b273ad
    Patch
  • github.com https://github.com/siyuan-note/siyuan/issues/16860
    Issue TrackingPatch
  • github.com https://github.com/siyuan-note/siyuan/security/advisories/GHSA-cv54-7wv7-qxcw
    ExploitPatchVendor Advisory