CVE-2026-33194Public exploitNetwork attack vector

Authenticated arbitrary file read via incomplete path denylist

Published Mar 20, 2026 · Updated Mar 20, 2026

Path traversal in SiYuan before 3.6.2 allows remote authenticated users to read arbitrary Linux host files through file-copy APIs. IsSensitivePath() in kernel/util/path.go treats every path absent from a hard-coded denylist as safe, leaving /opt, /usr, /home, /mnt, and /media readable. A high-privilege API token and network access to globalCopyFiles or importStdMd are required; exposed data can include application files, other users' files, and mounted secrets.

CVSS severity6.8
Medium
EPSS probability0.49%
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 3.6.2 allows remote authenticated users to read arbitrary Linux host files through file-copy APIs. IsSensitivePath() in kernel/util/path.go treats every path absent from a hard-coded denylist as safe, leaving /opt, /usr, /home, /mnt, and /media readable. A high-privilege API token and network access to globalCopyFiles or importStdMd are required; exposed data can include application files, other users' files, and mounted secrets.

The record

CVE
CVE-2026-33194
Published
Mar 20, 2026
Updated
Mar 20, 2026
Vendor
SiYuan Note
Product
SiYuan
Classifications
CWE-22, T1005
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 20, 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=< 3.6.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

SiYuan Note · SiYuanversion=< 3.6.2

Published CVSS scores

6.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A: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.

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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
Privilegesadmin
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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