What is CVE-2026-58616?

CVE-2026-58616 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. Copilot Chat (Microsoft Edge) Information Disclosure Vulnerability

Which CVE IDs does CVE-2026-58616 cover?

CVE-2026-58616 covers the following CVE IDs: CVE-2026-58616. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-58616?

CVE-2026-58616 has a CVSS v3 base score of 4.4, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-58616?

CVE-2026-58616 affects 6 products, including: Microsoft Edge (Chromium-based); Microsoft Edge for Android; Microsoft Edge for Linux; Microsoft Edge for MAC; Microsoft Edge for Windows; and others — see the full list on the advisory page.

CVE-2026-58616MediumCVSS 4.4

Copilot Chat (Microsoft Edge) Information Disclosure Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

August 28, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-58616 →

📋 Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Copilot Chat (Microsoft Edge) allows an authorized attacker to disclose information over a network.

🎯 Affected products6

Microsoft Edge (Chromium-based)
Microsoft Edge for Android
Microsoft Edge for Linux
Microsoft Edge for MAC
Microsoft Edge for Windows
Microsoft Edge for iOS

✅ Remediation

KBRelease Notes (Security Update) — fixed build 152.0.4191.52

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58616
referencehttps://learn.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security