PT-2026-46403 · Microsoft · Edge

Jianyang Song · CVE-2026-47644 · Published 2026-06-04 · Updated 2026-06-04

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions Microsoft Edge (affected versions not specified)

Description Improper neutralization of special elements in output used by a downstream component in Copilot Chat allows an unauthorized attacker to disclose information over a network. This is an injection issue where the AI sidebar can be used to leak data.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Special Elements Injection

Weakness Enumeration

CWE-74

Related Identifiers

CVE-2026-47644

Affected Products

Edge

References · 3

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47644 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-47644 · Security Note
• https://twitter.com/windowsforum/status/2062666278804856947 · Twitter Post