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CVE-2026-88078— Microsoft Edge (Chromium-based) Spoofing 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.

Microsoft Edge（基于 Chromium）中对加密签名的验证不当，允许未经授权的攻击者在网络中实施欺骗攻击。

CVSS 4.3 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-88078

Vulnerability Information
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Vulnerability Title
Microsoft Edge (Chromium-based) Spoofing Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Improper verification of cryptographic signature in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Microsoft Edge (Chromium-based) 1.0.0.0 ~ 156.0.4314.42 -

II. Public POCs for CVE-2026-88078

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III. Intelligence Information for CVE-2026-88078

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Other References for CVE-2026-88078 (1)

Same Patch Batch · Microsoft · 2026-10-29 · 15 CVEs total

CVE-2026-88077 8.8 HIGH Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability
CVE-2026-96196 8.8 HIGH Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability
CVE-2026-96203 8.8 HIGH Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability
CVE-2026-96192 8.8 HIGH Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
CVE-2026-96199 8.8 HIGH Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
CVE-2026-96198 8.8 HIGH Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
CVE-2026-85890 8.8 HIGH Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
CVE-2026-85897 8.8 HIGH Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
CVE-2026-85899 8.1 HIGH Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability
CVE-2026-114148 7.8 HIGH ASP.NET Core Elevation of Privilege Vulnerability
CVE-2026-96187 7.4 HIGH Microsoft Edge (Chromium-based) Information Disclosure Vulnerability
CVE-2026-88090 5.4 MEDIUM Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability
CVE-2026-85330 4.3 MEDIUM Microsoft Edge for Android Security Feature Bypass Vulnerability
CVE-2026-20942 4.3 MEDIUM Microsoft Edge (Chromium-based) Spoofing Vulnerability

IV. Related Vulnerabilities

Same product: Microsoft Edge (Chromium-based)
Same vendor: Microsoft
Same weakness: CWE-347