CVE-2026-82652Network attack vectorHinoki check available

Unlisted content disclosure via incomplete publish filtering

Published Aug 30, 2026 · Updated Aug 30, 2026

Information disclosure in SiYuan before 3.8.1 allows remote attackers to enumerate unlisted content through publish-mode listings. FilterEmbedBlocksByPublishAccess, FilterBlockAttributeViewKeysByPublishAccess, and FilterAttributeViewBacklinksByPublishAccess consult only the disabled list and omit the invisible list. Publish mode and an administrator-marked invisible item are required; anonymous readers learn unlisted block, key, or backlink metadata without reported write access.

CVSS severity6.9
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Information disclosure in SiYuan before 3.8.1 allows remote attackers to enumerate unlisted content through publish-mode listings. FilterEmbedBlocksByPublishAccess, FilterBlockAttributeViewKeysByPublishAccess, and FilterAttributeViewBacklinksByPublishAccess consult only the disabled list and omit the invisible list. Publish mode and an administrator-marked invisible item are required; anonymous readers learn unlisted block, key, or backlink metadata without reported write access.

The record

CVE
CVE-2026-82652
Published
Aug 30, 2026
Updated
Aug 30, 2026
Vendor
SiYuan Note
Product
SiYuan
Classifications
CWE-668, T1213
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 30, 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 <3.8.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SiYuan Note · SiYuanversion=0 <3.8.1

Published CVSS scores

6.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
5.3VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-668Exposure of Resource to Wrong Sphere
T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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