CVE-2026-45492: Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-18 · updated 2026-10-14
Weakness: CWE-20

Description

Improper input validation in Microsoft Edge (Chromium-based) allows an unauthorized attacker to bypass a security feature over a network.

Affected products

Microsoft Edge (Chromium): before 148.0.3967.70 — fixed in 148.0.3967.70
Microsoft Edge (Chromium): from 1.0.0.0 before 148.0.3967.70 — fixed in 148.0.3967.70

How to fix

Upgrade to a fixed version: Microsoft Edge (Chromium) 148.0.3967.70; Microsoft Edge (Chromium) 148.0.3967.70. Check the vendor advisory for mitigations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45492

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