CVE-2026-11841
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 · uneditedAn attacker may perform unauthenticated read and write operations on sensitive filesystem areas via the AppEngine Fileaccess over HTTP due to improper access restrictions. A critical filesystem directory was unintentionally exposed through the HTTP-based file access feature, allowing access without authentication. This includes device parameter files, enabling an attacker to read and modify application settings, including customer-defined passwords. Additionally, exposure of the custom application directory may allow execution of arbitrary Lua code within the sandboxed AppEngine environment.
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 confidenceThe AppEngine HTTP-based file access feature lacks proper authentication and authorization controls, exposing a critical filesystem directory to unauthenticated attackers. This enables reading and modifying device parameter files containing customer passwords, and exposes the custom application directory allowing potential execution of arbitrary Lua code within the sandboxed environment.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
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 if AppEngine is installedLocate AppEngine installation directory or running service (e.g., check for 'appengine' process, look in common installation paths like /opt/appengine, C:\Program Files\AppEngine, or check systemctl status for appengine service)Affected if AppEngine is present on the system
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Verify HTTP file access feature is enabledCheck AppEngine configuration files (commonly appengine.conf, config.xml, or settings.xml in the AppEngine config directory) for HTTP file access module/enable_http_file_access setting set to 'true' or 'enabled'Affected if HTTP-based file access feature is enabled in configuration
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Check authentication configuration for file accessInspect the HTTP file access authentication settings in AppEngine config files, looking for auth_required, require_authentication, or access_control settingsAffected if Authentication is disabled, set to 'none', or missing for the HTTP file access endpoint
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Confirm critical directories are exposedTest HTTP access to known sensitive paths such as /files/device_params, /files/custom_apps, or similar filesystem directory endpoints via curl or browser (e.g., curl http://localhost:<port>/files/)Affected if HTTP endpoints return directory listings or file contents for device parameters or custom application directories without login prompt
A system is affected if AppEngine with HTTP-based file access is running and exposes sensitive directories without requiring authentication.
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 dataImmediately restrict or disable the HTTP-based file access feature, implement proper authentication and authorization checks, and review filesystem permissions to ensure sensitive directories are not exposed. Reset any compromised passwords.
- Consultation4.0 h
- Implementation12.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-11841 — 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-2026-11841 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
- No spam, self-promotion, credentials, or personal data