CVE-2026-47644

Analyzed Analyzed - Analysis Complete

Microsoft Edge Copilot Chat Injection Vulnerability

Publication date: 2026-06-04

Last updated on: 2026-06-08

Assigner: Microsoft Corporation

Description

Improper 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.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-06-04

Last Modified

2026-06-08

Generated

2026-07-15

AI Q&A

2026-06-05

EPSS Evaluated

2026-07-14

NVD

CVE-2026-47644

EUVD

EUVD-2026-34336

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	copilot_chat	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-74	The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

Attack-Flow Graph

Executive Summary

This vulnerability involves improper neutralization of special elements in output used by a downstream component, which is a type of injection flaw in Copilot Chat within Microsoft Edge.

An unauthorized attacker can exploit this issue to disclose information over a network.

Impact Analysis

The vulnerability can allow an unauthorized attacker to disclose sensitive information over a network without permission.

This could lead to exposure of confidential data, potentially compromising user privacy and security.

Compliance Impact

This vulnerability allows an unauthorized attacker to disclose information over a network due to improper neutralization of special elements in output used by a downstream component in Copilot Chat (Microsoft Edge).

Such unauthorized information disclosure could potentially impact compliance with data protection regulations like GDPR and HIPAA, which require safeguarding sensitive information against unauthorized access and disclosure.

However, specific impacts on compliance with these standards are not detailed in the provided information.

Mitigation Strategies

To mitigate this vulnerability, ensure that your Microsoft Edge browser is updated to the latest version where the issue is addressed.

Avoid using the Copilot Chat feature until a security update is applied.

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