CVE-2026-72795Public exploitNetwork attack vectorHinoki check available

Unauthorized document disclosure via unfiltered embed queries

Published Aug 12, 2026 · Updated Aug 12, 2026

Missing authorization in SiYuan before 3.7.4 allows remote attackers to read restricted document blocks through publish-mode APIs. The getBlockDOMWithEmbed and getBlockDOMsWithEmbed handlers pass embed-query matches to resolveEmbedContentInBox, which inserts their HTML without applying publish-access or password filters. Publish mode and a published block whose embed query matches protected content are required; anonymous access applies when publish authentication is disabled.

CVSS severity9.2
Critical
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Missing authorization in SiYuan before 3.7.4 allows remote attackers to read restricted document blocks through publish-mode APIs. The getBlockDOMWithEmbed and getBlockDOMsWithEmbed handlers pass embed-query matches to resolveEmbedContentInBox, which inserts their HTML without applying publish-access or password filters. Publish mode and a published block whose embed query matches protected content are required; anonymous access applies when publish authentication is disabled.

The record

CVE
CVE-2026-72795
Published
Aug 12, 2026
Updated
Aug 12, 2026
Vendor
SiYuan Note
Product
SiYuan
Classifications
CWE-862, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 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=0 <3.7.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SiYuan Note · SiYuanversion=0 <3.7.4

Published CVSS scores

9.2VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
8.6VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
8.6GitHubCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
T1190Exploit Public-Facing Application

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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