CVE-2026-65804

Microsoft Edge (Chromium-based) Spoofing Vulnerability

Published Aug 3, 2026 CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed
Description
Improper control of generation of code ('code injection') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.

Analysis

AI-generated

Technical impact

Improper control of code generation in Microsoft Edge (Chromium-based) allows an attacker to inject and execute crafted code, leading to spoofing of network traffic. The vulnerability falls under CWE-94 and can enable an unauthorized actor to impersonate legitimate communications, potentially affecting confidentiality and integrity of data exchanged over the network.

Affected Systems

Microsoft Edge (Chromium-based) is the only vendor/product listed, with no specific version information provided in the advisory.

Risk and Exploitability

The CVSS score is 6.1, indicating a medium-impact vulnerability. The EPSS score is not available, and the issue is not listed in the CISA KEV catalog. The likely attack vector is a remote attacker who can deliver malicious input to the vulnerable component over a network. No specific restrictions on the attacker’s privileges are mentioned, suggesting the exploit could be performed from an external network context if the affected code path is reachable.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the latest Microsoft Edge update available from Microsoft that addresses CVE‑2026‑65804.
  • If an update is not immediately available, block or restrict network traffic that could trigger the vulnerable code generation pathway, such as disabling WebSocket or other dynamic script execution to untrusted domains.
  • Continuously monitor network logs for signs of spoofing or unauthorized code execution and configure alerts for suspicious patterns around the Edge browser.

Generated by OpenCVE AI on August 4, 2026 at 09:30 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Improper control of generation of code ('code injection') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
Title Microsoft Edge (Chromium-based) Spoofing Vulnerability
First Time appeared Microsoft
Microsoft edge Chromium
Weaknesses CWE-94
CPEs cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft edge Chromium
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C'}

Weaknesses
  • CWE-94

    Improper Control of Generation of Code ('Code Injection')

Sources

Status
PUBLISHED
Assigner
microsoft
Published
Updated
Nov 10, 2026, 10:41 PM
Reserved
Jul 22, 2026, 9:36 PM
Status
Analyzed
Published
Aug 4, 2026, 12:17 AM
Modified
Oct 23, 2026, 11:10 PM