What’s Vulnerable › Vulnerabilities
CVE-2026-66314: Microsoft Edge (Chromium-based) Information Disclosure Vulnerability
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.6% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-03 · updated 2026-10-28
- Weakness: CWE-367
Description
Time-of-check time-of-use (toctou) race condition in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.
Affected products
- Microsoft Edge (Chromium): before 151.0.4129.59 — fixed in 151.0.4129.59
- Microsoft Edge (Chromium): from 1.0.0.0 before 151.0.4129.59 — fixed in 151.0.4129.59
How to fix
Upgrade to a fixed version: Microsoft Edge (Chromium) 151.0.4129.59; Microsoft Edge (Chromium) 151.0.4129.59. Check the vendor advisory for mitigations.
References
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