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CVE-2026-32751

B3log Siyuan remote code execution

9.0 CRITICALPublic exploitEPSS 0.82%
  1. Published19 Mar 2026

Description

SiYuan is a personal knowledge management system. In versions 3.6.0 and below, the mobile file tree (MobileFiles.ts) renders notebook names via innerHTML without HTML escaping when processing renamenotebook WebSocket events. The desktop version (Files.ts) properly uses escapeHtml() for the same operation. An authenticated user who can rename notebooks can inject arbitrary HTML/JavaScript that executes on any mobile client viewing the file tree. Since Electron is configured with nodeIntegration: true and contextIsolation: false, the injected JavaScript has full Node.js access, escalating stored XSS to full remote code execution. The mobile layout is also used in the Electron desktop app when the window is narrow, making this exploitable on desktop as well. This issue has been fixed in version 3.6.1.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionRequired
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Affected products

B3log Siyuan< 3.6.1

Remediation

Fixed in
B3log Siyuan≥ 3.6.1

References

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Frequently asked

Is CVE-2026-32751 being actively exploited?

CVE-2026-32751 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.82%.

How severe is CVE-2026-32751?

CVE-2026-32751 has a CVSS 3.1 base score of 9.0, rated critical. EPSS estimates a 0.82% probability of exploitation.

Which products are affected by CVE-2026-32751?

Affected products include B3log Siyuan.

How do I fix CVE-2026-32751?

Upgrade affected software to a fixed version, for example B3log Siyuan 3.6.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-32751 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.