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High

Information Disclosure in Copilot Chat (Microsoft Edge)

IdentifiersCVE-2026-47644CWE-74· Improper Neutralization of Special…

CVE-2026-47644 is an information disclosure vulnerability in Copilot Chat for Microsoft Edge caused by improper neutralization of special elements in output used by a downstream component, i.e., an injection flaw. Based on the provided advisory text, the vulnerable condition exists in how Copilot Chat output is handled by a downstream component, enabling unauthorized disclosure of information over a network. The provided content does not identify a specific vulnerable function or code path.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows an unauthorized attacker to disclose information over a network from Copilot Chat in Microsoft Edge. Based on the provided information, the primary security impact is exposure of information rather than code execution or privilege escalation.

Mitigation

If you can’t patch tonight, do this now.

No customer mitigation is required. Microsoft states the vulnerability has already been fully mitigated by Microsoft, and there is no action for users of the service to take.

Remediation

Patch, then assume compromise.

No customer remediation is required. Microsoft states the issue has already been fully mitigated on the service side and that the CVE was published for transparency.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
Microsoft CorporationCopilot Chatapplication
Microsoft CorporationCopilot Chat Edgeapplication
Microsoft CorporationEdgeapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

2 SOURCESView more in app
What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-47644
NVD
nvd.nist.gov/vuln/detail/CVE-2026-47644
MITRE CWE · CWE-74
Improper Neutralization of Special Elements in…
Vendor Advisory
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47644
Information Disclosure in Copilot Chat (Microsoft Edge) (CVE-2026-47644) | Mallory