CVE-2026-41894Public exploitNetwork attack vector

Authenticated file disclosure via double-decoded export paths

Published Apr 24, 2026 · Updated Apr 24, 2026

Path traversal in SiYuan before 3.6.5 allows remote authenticated users to read arbitrary workspace files through the export endpoint. serveExport redundantly calls url.PathUnescape after Go has already decoded the request path, turning double-encoded dot segments into parent-directory traversal before joining the path. Any authenticated account, including a low-privilege Publish Reader, can retrieve the document database, logs, and user documents accessible within the workspace.

CVSS severity7.1
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in SiYuan before 3.6.5 allows remote authenticated users to read arbitrary workspace files through the export endpoint. serveExport redundantly calls url.PathUnescape after Go has already decoded the request path, turning double-encoded dot segments into parent-directory traversal before joining the path. Any authenticated account, including a low-privilege Publish Reader, can retrieve the document database, logs, and user documents accessible within the workspace.

The record

CVE
CVE-2026-41894
Published
Apr 24, 2026
Updated
Apr 24, 2026
Vendor
SiYuan Note
Product
SiYuan
Classifications
CWE-22, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.6.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

SiYuan Note · SiYuanversion=< 3.6.5

Published CVSS scores

7.1GitHub, Inc.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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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