CVE-2026-126266

SiYuan from 3.6.0 before 3.8.9 Publish-Password Bypass via getDoc Regex Keywords

Published Nov 13, 2026 CVSS 4.0 · 8.7 High EPSS n/a KEV · Not listed

Description

SiYuan from 3.6.0 before 3.8.9 contains an information disclosure vulnerability that allows unauthenticated publish visitors to bypass per-document passwords via regex search in getDoc. Attackers can send POST requests to /api/filetree/getDoc with queryMethod 3 and a broad regex to read protected body text returned in the unfiltered keywords field.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

siyuan-note

siyuan

unaffected

Version	Status	Constraints
`3.6.0`	affected	< 3.8.9
`3.8.9`	unaffected	—

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-qf37-w288-frvq
https://www.vulncheck.com/advisories/siyuan-from-3.6.0-before-3.8.9-publish-password-bypass-via-getdoc-regex-keywords

History

Nov 13, 2026 9:45 AM Description updated. Title updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		SiYuan from 3.6.0 before 3.8.9 contains an information disclosure vulnerability that allows unauthenticated publish visitors to bypass per-document passwords via regex search in getDoc. Attackers can send POST requests to /api/filetree/getDoc with queryMethod 3 and a broad regex to read protected body text returned in the unfiltered keywords field.
Title		SiYuan from 3.6.0 before 3.8.9 Publish-Password Bypass via getDoc Regex Keywords
First Time appeared		B3log B3log siyuan
Weaknesses		CWE-200
CPEs		cpe:2.3:a:b3log:siyuan::::::::
Vendors & Products		B3log B3log siyuan
References		https://github.com/siyuan-note/siyuan/security/advisories/GHSA-qf37-w288-frvq https://www.vulncheck.com/advisories/siyuan-from-3.6.0-before-3.8.9-publish-password-bypass-via-getdoc-regex-keywords
Metrics		cvssV3_1 `{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}` cvssV4_0 `{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}`