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:
Percentile:
Meta Information
Published
2026-06-04
Last Modified
2026-06-08
Generated
2026-06-25
AI Q&A
2026-06-05
EPSS Evaluated
2026-06-24
NVD
CVE-2026-47644
EUVD
EUVD-2026-34336
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
microsoft copilot_chat *
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
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
AI Quick Actions
Instant insights powered by AI
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.

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.

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.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-47644. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart