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CVE-2026-45147— SiYuan: Broken access control in SiYuan `/api/tag/getTag` — Reader role can mutate `Conf.Tag.Sort` and persist to disk

Quick assessment

Affected
siyuan-note siyuan
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SiYuan是SiYuan开源的一个个人知识管理系统。 SiYuan 3.7.0之前版本存在授权问题漏洞，该漏洞源于POST /api/tag/getTag端点缺少管理员和只读权限检查，可能导致配置写入。

CVSS 4.3 · Medium EPSS 0.25% · P16

Affected Version Matrix 1

VendorProduct Version RangeStatus
siyuan-note siyuan < 3.7.0 affected
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I. Basic Information for CVE-2026-45147

Vulnerability Information
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Vulnerability Title
SiYuan: Broken access control in SiYuan `/api/tag/getTag` — Reader role can mutate `Conf.Tag.Sort` and persist to disk
Source: CVE Program / CVE List V5
Vulnerability Description
SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, POST /api/tag/getTag is registered with model.CheckAuth only, omitting both model.CheckAdminRole and model.CheckReadonly, despite the handler performing a configuration write that is normally guarded by both. Any authenticated user — including publish-service RoleReader accounts and RoleEditor accounts on a read-only workspace — can call this endpoint with a sort argument to mutate model.Conf.Tag.Sort and trigger model.Conf.Save(), which atomically rewrites the entire workspace conf.json. This vulnerability is fixed in 3.7.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
SiYuan 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SiYuan是SiYuan开源的一个个人知识管理系统。 SiYuan 3.7.0之前版本存在授权问题漏洞，该漏洞源于POST /api/tag/getTag端点缺少管理员和只读权限检查，可能导致配置写入。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
siyuan-note siyuan < 3.7.0 -

II. Public POCs for CVE-2026-45147

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III. Intelligence Information for CVE-2026-45147

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Vendor Advisories for CVE-2026-45147 (1)

Same Patch Batch · siyuan-note · 2026-05-14 · 7 CVEs total

CVE-2026-45375 9.0 CRITICAL SiYuan: Bazaar marketplace renders unescaped package `name` and `version` metadata, allowi
CVE-2026-44586 8.3 HIGH SiYuan: Bazaar marketplace renders unescaped package author metadata, allowing XSS and Ele
CVE-2026-45148 4.3 MEDIUM SiYuan: Broken access control in SiYuan publish-mode Readers can enumerate metadata
CVE-2026-45371 SiYuan: SiYuan publish-mode Reader can mutate Conf and SQL index via 8 ungated APIs
CVE-2026-44670 SiYuan: Stored XSS via Attribute View name to Electron renderer RCE in SiYuan
CVE-2026-44588 SiYuan: URL-encoded title bypasses `escapeAriaLabel`, decoded by `decodeURIComponent` into

IV. Related Vulnerabilities

Same product: siyuan
Same vendor: siyuan-note
Same weakness: CWE-285

V. Comments for CVE-2026-45147

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