CVE-2026-65804: Microsoft Edge (Chromium-based) Spoofing Vulnerability

Overview

Severity
Medium (CVSS 6.1)
CVSS 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
Category
Edge - Chromium
Exploit Status
Not Exploited
Exploitation Likelihood
Unlikely
Patch Tuesday
2026-Jul
Released
2026-07-31

Description

Improper control of generation of code ('code injection') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.

FAQ

According to the CVSS metrics, successful exploitation of this vulnerability could lead to some loss of confidentiality (C:L), and integrity (I:L) but lead to no loss of availability (A:N). What is the impact of this vulnerability? An attacker who successfully exploited the vulnerability could view some sensitive information (Confidentiality), make changes to disclosed information (Integrity), but cannot limit access to the resource (Availability). According to the CVSS metric, a successful exploitation could lead to a scope change (S:C). What does this mean for this vulnerability? An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities. According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do? The user must visit the attacker‑controlled webpage, and perform the two tap gestures that cause autofill to activate. According to the CVSS metric, successful exploitation of this vulnerability could lead to some loss of integrity (I:L)? What does that mean for this vulnerability? The user would need to access the URL of the malicious website, which could spoof the content of a legitimate website, and then click a popup displayed on that site. What is the version information for this release? Microsoft Edge Version Date Released Based on Chromium Version 151.0.4129.59 07/31/2026 151.0.7922.71/.72

Affected Products (1)

Browser

  • Microsoft Edge (Chromium-based)

Acknowledgments

Kugelblitz with Microsoft, Kugelblitz with Microsoft

Revision History

  • 2026-07-31: Information published.