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CVE-2026-58616— Copilot Chat (Microsoft Edge) Information Disclosure Vulnerability

Quick assessment

Affected
Microsoft Microsoft Edge (Chromium-based)
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Copilot 聊天功能（Microsoft Edge）中存在并发执行时共享资源同步不当的“竞态条件”（race condition），允许经过授权的攻击者通过网络泄露信息。

CVSS 4.4 · Medium

Affected Version Matrix 1

VendorProduct Version RangeStatus
Microsoft Microsoft Edge (Chromium-based) 1.0.0.0< 152.0.4191.53 affected
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I. Basic Information for CVE-2026-58616

Vulnerability Information
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Vulnerability Title
Copilot Chat (Microsoft Edge) Information Disclosure Vulnerability
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Microsoft Edge (Chromium-based) 1.0.0.0 ~ 152.0.4191.53 -

II. Public POCs for CVE-2026-58616

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III. Intelligence Information for CVE-2026-58616

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Vendor Advisories for CVE-2026-58616 (1)

Same Patch Batch · Microsoft · 2026-08-28 · 8 CVEs total

CVE-2026-72984 8.8 HIGH Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
CVE-2026-66324 6.5 MEDIUM Microsoft Edge (Chromium-based) Spoofing Vulnerability
CVE-2026-70309 5.4 MEDIUM Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability
CVE-2026-66323 5.4 MEDIUM Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
CVE-2026-62904 5.4 MEDIUM Microsoft Edge (Chromium-based) Information Disclosure Vulnerability
CVE-2026-70331 5.4 MEDIUM Microsoft Edge for iOS Spoofing Vulnerability
CVE-2026-66798 4.3 MEDIUM Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability

IV. Related Vulnerabilities

Same product: Microsoft Edge (Chromium-based)
Same vendor: Microsoft
Same weakness: CWE-362

V. Comments for CVE-2026-58616

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