CVE-2020-26158
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedLeanote Desktop through 2.6.2 allows XSS because a note's title is mishandled when the batch feature is triggered. This leads to remote code execution because of Node integration.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceLeanote Desktop through 2.6.2 contains a stored XSS vulnerability where note titles are not properly sanitized when the batch feature is triggered. This allows attackers to inject malicious JavaScript that can achieve remote code execution due to the application's Node.js integration.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data<= 2.6.2CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Verify Leanote Desktop installationCheck the installed version of Leanote Desktop. On Windows, look in Add/Remove Programs or the application directory for version information. On macOS, check the app bundle or /Applications folder. On Linux, check the package manager or the directory where Leanote was installed.Affected if The installed version is 2.6.2 or any earlier version (anything <= 2.6.2)
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Confirm version numberIf a version number is visible, compare it against the affected range. The application typically displays its version in the About section of the desktop client or in the initial welcome screen.Affected if The displayed version is 2.6.2 or lower
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Identify Electron configuration fileLocate the Electron configuration file (usually named config.js, config.json, or within a resources folder) in the Leanote Desktop installation directory. This file often contains settings for Node integration and context isolation.Affected if Node integration is explicitly set to true or enabled in the configuration
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Check for the batch featureIn the Leanote Desktop client, navigate to find the batch feature functionality. This is typically accessible through the notes menu, a bulk operations option, or a notes management panel. Try to create or edit multiple notes simultaneously to observe how note titles are handled.Affected if The batch feature is present and accessible, allowing bulk creation or editing of notes
You are affected if Leanote Desktop version 2.6.2 or lower is installed AND Node integration is enabled in the Electron configuration, as this combination allows the stored XSS in note titles to achieve remote code execution.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpgrade to a patched version if available; alternatively, disable Node integration in the Electron configuration or implement robust input sanitization/escaping for all note title fields before rendering.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,408.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-26158 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2020-26158 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data