CVE-2026-73606

Medium

Description

SiYuan versions before v3.7.4 contain an information disclosure vulnerability in the /api/block/getRefIDs endpoint that fails to check password-protected document tiers. Unauthenticated readers can discover that password-protected documents reference specific blocks and obtain block identifiers without entering the document password.

SeverityMedium

CVSS5.8

Exploit probability—

ProductGithub.com/siyuan-note/siyuan/kernel

PublishedAug 13, 2026

First seenAug 13, 2026

Weakness typeCWE-639Authorization bypass through user-controlled key

How to fix

Update

github.com/siyuan-note/siyuan/kernel0.0.0-20260812083335-251596fc0de2 or later

Vendor advisories

github.com/siyuan-note/siyuan/security/advisories/GHSA-vg99-7gj7-2fr5

Affected products

Product	Affected versions	Fixed in
github.com/siyuan-note/siyuan/kernelGo	v < 0.0.0-20260812083335-251596fc0de2	0.0.0-20260812083335-251596fc0de2

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