1. Home
  2. CVE Database
  3. CVE-2026-66318
HIGH · 8.1

CVE-2026-66318

Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.

Vulnerability Description

Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.

CVSS Score

8.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE

Affected Products

VendorProductVersions
MicrosoftEdge Chromium< 151.0.4129.59

Related Weaknesses (CWE)

CWE-346

References

FAQ

What is CVE-2026-66318?

CVE-2026-66318 is a vulnerability with a CVSS score of 8.1 (HIGH). Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.

How severe is CVE-2026-66318?

CVE-2026-66318 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-66318?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Edge Chromium.