CVE-2026-70339: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Microsoft Edge (Chromium-based)
CVE-2026-70339 is a medium severity vulnerability in Microsoft Edge (Chromium-based) involving type confusion, where an attacker can access a resource using an incompatible type. This flaw allows unauthorized code execution over a network but requires user interaction. An official fix is available from Microsoft.
AI Analysis
Technical Summary
This vulnerability, identified as CWE-843 (Access of Resource Using Incompatible Type or 'Type Confusion'), affects Microsoft Edge (Chromium-based). It allows an attacker to execute code remotely by exploiting improper handling of resource types. The CVSS 3.1 base score is 5.4, indicating medium severity, with network attack vector, low attack complexity, no privileges required, but user interaction needed. The vulnerability has been officially fixed by Microsoft.
Potential Impact
An attacker can execute code remotely on a vulnerable system running Microsoft Edge (Chromium-based) by exploiting the type confusion flaw. This could lead to limited confidentiality and integrity impacts without affecting availability. Exploitation requires user interaction. No known exploits in the wild have been reported.
Mitigation Recommendations
An official fix is available from Microsoft and should be applied to remediate this vulnerability. Users should update Microsoft Edge (Chromium-based) to the patched version as soon as possible.
CVE-2026-70339: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Microsoft Edge (Chromium-based)
Description
CVE-2026-70339 is a medium severity vulnerability in Microsoft Edge (Chromium-based) involving type confusion, where an attacker can access a resource using an incompatible type. This flaw allows unauthorized code execution over a network but requires user interaction. An official fix is available from Microsoft.
CVSS v3.1
Score 5.4medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CWE-843 (Access of Resource Using Incompatible Type or 'Type Confusion'), affects Microsoft Edge (Chromium-based). It allows an attacker to execute code remotely by exploiting improper handling of resource types. The CVSS 3.1 base score is 5.4, indicating medium severity, with network attack vector, low attack complexity, no privileges required, but user interaction needed. The vulnerability has been officially fixed by Microsoft.
Potential Impact
An attacker can execute code remotely on a vulnerable system running Microsoft Edge (Chromium-based) by exploiting the type confusion flaw. This could lead to limited confidentiality and integrity impacts without affecting availability. Exploitation requires user interaction. No known exploits in the wild have been reported.
Mitigation Recommendations
An official fix is available from Microsoft and should be applied to remediate this vulnerability. Users should update Microsoft Edge (Chromium-based) to the patched version as soon as possible.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-f2gh-36p2-m2p2
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-70339"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
- Remediation Level
- official-fix
- State
- PUBLISHED
Threat ID: 6a7c9b6fbf8831d539ce0101
Added to database: 08/12/2026, 16:12:31 UTC
Last enriched: 09/10/2026, 22:59:04 UTC
Last updated: 09/25/2026, 08:21:15 UTC
Views: 46
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