CVE-2026-58616: medium-severity vulnerability in Microsoft Edge (Chromium-based)
Copilot Chat (Microsoft Edge) Information Disclosure Vulnerability
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 4.4epss 0.3%
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.
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C
Affected products
Microsoft · Microsoft Edge (Chromium-based)Microsoft · Microsoft Edge for AndroidMicrosoft · Microsoft Edge for iOSMicrosoft · Microsoft Edge for LinuxMicrosoft · Microsoft Edge for MACMicrosoft · Microsoft Edge for WindowsRelated CVEs — Microsoft Edge (Chromium-based)
In the same product, most dangerous first.
CVE-2026-96951HIGHWindows Shell Security Feature Bypass VulnerabilityEPSS 9.8%KEVCVE-2024-21388MEDIUMMicrosoft Edge (Chromium-based) Elevation of Privilege VulnerabilityEPSS 35.6%CVE-2023-33145MEDIUMMicrosoft Edge (Chromium-based) Information Disclosure VulnerabilityEPSS 8.6%CVE-2021-30615—CVE-2021-30615EPSS 5.6%CVE-2021-30614—CVE-2021-30614EPSS 4.5%CVE-2021-30616—CVE-2021-30616EPSS 4.1%