What is CVE-2026-88078?

CVE-2026-88078 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. Microsoft Edge (Chromium-based) Spoofing Vulnerability

Which CVE IDs does CVE-2026-88078 cover?

CVE-2026-88078 covers the following CVE IDs: CVE-2026-88078. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-88078?

CVE-2026-88078 has a CVSS v3 base score of 4.3, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-88078?

CVE-2026-88078 affects 1 product, including: Microsoft Edge (Chromium-based).

CVE-2026-88078MediumCVSS 4.3

Microsoft Edge (Chromium-based) Spoofing Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

October 27, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-88078 →

📋 Description

Improper verification of cryptographic signature in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.

🎯 Affected products1

Microsoft Edge (Chromium-based)

✅ Remediation

KBRelease Notes (Security Update) — fixed build 156.0.4314.42

🔗 References (3)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88078
patchhttps://catalog.update.microsoft.com/Search.aspx?q=Edge-Stable
referencehttps://learn.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security