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CVE-2026-47644: Copilot Chat (Microsoft Edge) Information Disclosure Vulnerability

mediumCVSS 6.5CVE-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.

CSIRTS triage

vendor: Microsoftproduct: EdgeInformation disclosure
What
Improper neutralization of special elements in output allows an unauthorized attacker to disclose information over a network.
Who is affected
Users of Microsoft Edge with Copilot Chat feature enabled.
Urgency
Remediation is important due to the medium severity and potential for information disclosure.
Action
Apply the latest security patch for Microsoft Edge.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
medium — CVSS 6.5
Published
2026-06-09
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47644

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-47644coverage & exploitation statusNVD · CVE.org

Recent advisories for Copilot Chat

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from Microsoft Security Response Center