CVE-2020-26157
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 during syncing. 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 · high confidenceLeanote Desktop through version 2.6.2 suffers from a stored cross-site scripting (XSS) vulnerability in the note title field that is triggered during the sync process. Because the desktop application uses Node integration (allowing Node.js APIs to be accessible from renderer processes), an attacker can inject malicious JavaScript via the note title that executes in the context of the application, leading to arbitrary remote code execution on the victim's machine.
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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Identify Leanote Desktop versionCheck the application's About or Help section, or examine the installed package metadata to confirm the exact version numberAffected if The installed version is 2.6.2 or lower (any version through 2.6.2)
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Confirm Node integration is enabledInspect the Electron main process configuration or the renderer process settings to determine if Node integration is enabled in the desktop application's web preferencesAffected if Node integration is enabled in the renderer process, allowing Node.js APIs to be accessible from web content
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Verify the sync feature is activeCheck if Leanote sync functionality is configured and actively syncing note data, as the XSS triggers during the sync processAffected if Sync is enabled and the application processes incoming note titles from the server
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Examine note title storage and processingReview how note titles are handled during sync operations - the application does not sanitize note titles from the sync server before rendering themAffected if The application accepts and renders note titles from sync without sanitization, allowing stored XSS to persist
A user is affected if they are running Leanote Desktop version 2.6.2 or lower with Node integration enabled and the sync feature active, as this combination allows injected JavaScript in note titles to execute with full Node.js API access.
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 dataImplement strict input sanitization and validation on note titles during the sync operation, and disable or properly sandbox Node integration in the desktop renderer process to prevent XSS from escalating to RCE.
- Consultation6.0 h
- Implementation20.0 h
- Testing10.0 h
- Review / QA5.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $11,520.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-26157 — 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-2020-26157 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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- 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
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