CVE-2026-66313 Details
Description
Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform tampering locally.
A tampering vulnerability has been identified in Microsoft Edge (Chromium-based) versions through 151.0.4129.59. This vulnerability arises from an origin validation error, which allows an unauthorized attacker to perform local tampering.
Users can download the security update for this vulnerability from the Microsoft Update Catalog. For more information, see the release notes on the Microsoft Edge security updates.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Aug 4, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66313 | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-346 | Origin Validation Error | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| microsoft edge chromium | < 151.0.4129.59 |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 6, 2026 | Initial Analysis | [email protected] |
| Aug 4, 2026 | CVE Modified | CISA-ADP |
| Aug 4, 2026 | New CVE Received | [email protected] |