CVE-2026-21227
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 · uneditedImproper limitation of a pathname to a restricted directory ('path traversal') in Azure Logic Apps allows an unauthorized attacker to elevate privileges over a network.
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 confidenceA path traversal vulnerability in Azure Logic Apps allows unauthorized attackers to escape restricted directories and access files outside the intended scope, enabling privilege escalation over the network.
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 dataall versionsCVSS 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
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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 Azure Logic Apps deploymentsRun 'az logic list --resource-group <rg-name>' or check Azure Portal for Logic Apps resources in your subscriptionAffected if Any Azure Logic Apps exist in the subscription
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Locate Logic Apps with file operation connectorsReview Logic App workflow definitions for connectors such as File System, FTP, SFTP, Azure Blob Storage, or Azure File Storage. Use 'az logic workflow show --resource-group <rg> --name <app>' to inspect workflow JSONAffected if Logic Apps contain connectors that perform file system or blob operations
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Inspect connector action configurations for path parametersExamine the JSON definition of file operation actions (e.g., 'Create file', 'Copy file', 'List files') and identify parameters that accept file or folder paths as inputsAffected if File operation actions accept dynamic or user-supplied path inputs without apparent validation
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Check for direct path traversal patterns in workflow inputsSearch workflow run history and parameters for patterns like '../' or absolute paths in file operation inputs. Use Azure Monitor logs or Logic App run history to review recent executionsAffected if File path inputs contain traversal sequences or point to locations outside intended directories
You are affected if you have Azure Logic Apps with file operation connectors that accept external or dynamic path inputs, as the vulnerability allows escaping restricted directories regardless of Logic App version.
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 dataApply available Microsoft patches for Azure Logic Apps; validate and sanitize all file path inputs; restrict file system access permissions to least privilege; review Logic Apps workflows for file operations.
- Consultation4.0 h
- Implementation8.0 h
- Testing12.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $7,616.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-21227 — 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-2026-21227 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
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