What is CVE-2026-47644?

CVE-2026-47644 is a medium-severity vulnerability in Microsoft Copilot_chat, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.5/10. Published 2026-06-04.

How severe is CVE-2026-47644?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Microsoft Copilot_chat

CVE-2026-47644

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.

EPSS: 0.007 (50.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

Affected products

Weakness classification (CWE)

CWE-74 — Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection)

References

Copilot Chat (Microsoft Edge) Information Disclosure Vulnerability (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-47644?: CVE-2026-47644 is a medium-severity vulnerability in Microsoft Copilot_chat, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.5/10. Published 2026-06-04.
How severe is CVE-2026-47644?: Medium severity. CVSS v3 base score is 6.5 out of 10.