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NVD Vulnerability Details :
CVE-2026-40922
Modified
More InfoOfficial Page
Source-security-advisories@github.com
View Known Exploited Vulnerability (KEV) details
Published At-17 Apr, 2026 | 01:17
Updated At-20 Apr, 2026 | 16:16

SiYuan is an open-source personal knowledge management system. In versions 3.6.1 through 3.6.3, a prior fix for XSS in bazaar README rendering (incomplete fix for CVE-2026-33066) enabled the Lute HTML sanitizer, but the sanitizer does not block iframe tags, and its URL-prefix blocklist does not effectively filter srcdoc attributes which contain raw HTML rather than URLs. A malicious bazaar package author can include an iframe with a srcdoc attribute containing embedded scripts in their README. When other users view the package in SiYuan's marketplace UI, the payload executes in the Electron context with full application privileges, enabling arbitrary code execution on the user's machine. This issue has been fixed in version 3.6.4.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.05.3MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary3.15.4MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Type: Secondary
Version: 4.0
Base score: 5.3
Base severity: MEDIUM
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Type: Primary
Version: 3.1
Base score: 5.4
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CPE Matches
b3log
b3log
>>siyuan>>Versions from 3.6.1(inclusive) to 3.6.4(exclusive)
cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-79Secondarysecurity-advisories@github.com
CWE ID: CWE-79
Type: Secondary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/advisories/GHSA-4663-4mpg-879vsecurity-advisories@github.com
Third Party Advisory
https://github.com/siyuan-note/siyuan/commit/b382f50e1880ed996364509de5a10a72d7409428security-advisories@github.com
Patch
https://github.com/siyuan-note/siyuan/releases/tag/v3.6.4security-advisories@github.com
Release Notes
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-8q5w-mmxf-48jgsecurity-advisories@github.com
Exploit
Third Party Advisory
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-8q5w-mmxf-48jg134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit
Third Party Advisory
Hyperlink: https://github.com/advisories/GHSA-4663-4mpg-879v
Source: security-advisories@github.com
Resource:
Third Party Advisory
Hyperlink: https://github.com/siyuan-note/siyuan/commit/b382f50e1880ed996364509de5a10a72d7409428
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/siyuan-note/siyuan/releases/tag/v3.6.4
Source: security-advisories@github.com
Resource:
Release Notes
Hyperlink: https://github.com/siyuan-note/siyuan/security/advisories/GHSA-8q5w-mmxf-48jg
Source: security-advisories@github.com
Resource:
Exploit
Third Party Advisory
Hyperlink: https://github.com/siyuan-note/siyuan/security/advisories/GHSA-8q5w-mmxf-48jg
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Resource:
Exploit
Third Party Advisory
Change History
0Changes found
Details not found