CVE-2026-47644
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 neutralization of special elements in output used by a downstream component ('injection') in Copilot Chat (Microsoft Edge) allows an unauthorized attacker to disclose information 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 confidenceAn injection vulnerability exists in Copilot Chat within Microsoft Edge where improper neutralization of special elements in output allows an unauthorized attacker to disclose sensitive information over a network. The vulnerability stems from how output data is processed by a downstream component, potentially enabling exfiltration of data through maliciously crafted inputs.
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
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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 Microsoft Edge installationCheck for Microsoft Edge on the system - look for the executable at the default installation path (C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe) or via 'Get-ItemProperty' query of the registry key HKLM\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\Microsoft EdgeAffected if Microsoft Edge browser is installed on the system
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Confirm Copilot Chat feature accessibilityOpen Microsoft Edge and attempt to access the Copilot Chat feature - typically accessible via the Copilot icon in the toolbar or by navigating to copilot.microsoft.com within the Edge browserAffected if The Copilot Chat interface is visible and functional within Microsoft Edge
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Check Edge versionIn Microsoft Edge, navigate to edge://settings/help or type 'edge://version' in the address bar to display the installed version numberAffected if Any version of Microsoft Edge is running with Copilot Chat functionality present
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Verify Copilot integration is enabledIn Microsoft Edge, go to Settings > Privacy, search, and services > Services and check if Microsoft Copilot is enabled, or navigate to edge://settings/privacy to review Copilot-related service togglesAffected if Copilot services are enabled in Edge settings, making the injection attack surface active
The environment is affected if Microsoft Edge with the Copilot Chat feature is installed and the Copilot service is enabled, regardless of version since all versions are vulnerable.
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 dataOrganizations should monitor for Microsoft Edge security updates addressing this vulnerability and apply patches promptly. Until a fix is available, restrict or monitor Copilot Chat usage in sensitive environments and implement network-level controls to limit potential exfiltration channels.
- Consultation2.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-47644 — 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-2026-47644 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