CVE-2026-72800: SiYuan before v3.7.4 Information Disclosure via Unfiltered API

Published Aug 12, 2026
·
Updated

SiYuan versions before v3.7.4 fail to apply publish-access filtering to the getAttributeViewKeysByID endpoint, allowing authenticated readers to retrieve complete database column schemas including descriptions, select vocabularies, and template expressions. Additionally, getBlockDefIDsByRefText and getBlockRelevantIDs endpoints enumerate workspace-wide block IDs without publish scoping, enabling attackers to discover valid block identifiers across publish boundaries and access content from hidden or password-protected documents.

Affected Software

1 affected component
SiYuan SiYuan<3.7.4

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade SiYuan to a version that resolves this vulnerability.

    Fixed in 3.7.4
  2. Compensating control

    Ensure API publish-access scoping/filtering is correctly applied so workspace-wide block ID enumeration across publish boundaries is prevented (addresses getBlockDefIDsByRefText and getBlockRelevantIDs unfiltered enumeration).

Event History

Aug 12, 2026
CVE Published
via MITRE·07:07 PM
Data Sourced
via MITRE·07:07 PM
DescriptionSeverityWeakness
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Frequently Asked Questions

1

What is the severity of CVE-2026-72800?

The severity of CVE-2026-72800 is rated as medium with a score of 5.8.

2

What does CVE-2026-72800 exploit?

CVE-2026-72800 exploits the lack of publish-access filtering in the getAttributeViewKeysByID API endpoint.

3

How can I mitigate the risk of CVE-2026-72800?

To mitigate the risk of CVE-2026-72800, upgrade SiYuan to version 3.7.4 or later.

4

Who is affected by CVE-2026-72800?

Authenticated users of SiYuan versions before v3.7.4 are affected by CVE-2026-72800.

5

What kind of information can be disclosed through CVE-2026-72800?

CVE-2026-72800 can disclose complete database column schemas, including descriptions and vocabularies.

Company

Resources

Contact

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CVE-2026-72800 - SiYuan before v3.7.4 Information Disclosure via Unfiltered API - SecAlerts