CVE-2026-57989: CWE-346: Origin Validation Error in Microsoft Microsoft Edge (Chromium-based)
Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.
AI Analysis
Technical Summary
This vulnerability, identified as CWE-346 (Origin Validation Error), affects Microsoft Edge (Chromium-based) version 1.0.0.0. It allows an attacker without privileges to bypass origin validation controls, leading to unauthorized information disclosure over the network. The CVSS 3.1 base score is 7.4, reflecting network attack vector, low attack complexity, no privileges required, user interaction required, scope changed, and high confidentiality impact. Microsoft has published an official fix for this issue.
Potential Impact
An attacker can exploit this origin validation error to disclose sensitive information over the network without requiring privileges. The confidentiality impact is high, but integrity and availability are not affected. There are no known exploits in the wild at this time.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. Users and administrators should apply the security update from Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57989 to remediate this issue.
CVE-2026-57989: CWE-346: Origin Validation Error in Microsoft Microsoft Edge (Chromium-based)
Description
Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.
CVSS v3.1
Score 7.4high
Affected software
Microsoft
Microsoft Edge (Chromium-based)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CWE-346 (Origin Validation Error), affects Microsoft Edge (Chromium-based) version 1.0.0.0. It allows an attacker without privileges to bypass origin validation controls, leading to unauthorized information disclosure over the network. The CVSS 3.1 base score is 7.4, reflecting network attack vector, low attack complexity, no privileges required, user interaction required, scope changed, and high confidentiality impact. Microsoft has published an official fix for this issue.
Potential Impact
An attacker can exploit this origin validation error to disclose sensitive information over the network without requiring privileges. The confidentiality impact is high, but integrity and availability are not affected. There are no known exploits in the wild at this time.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. Users and administrators should apply the security update from Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57989 to remediate this issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-26T17:45:44.854Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57989","vendor":"Microsoft"}]
Threat ID: 6a66498b9c2644c7f82a56c7
Added to database: 07/26/2026, 17:53:15 UTC
Last enriched: 08/13/2026, 15:58:13 UTC
Last updated: 09/10/2026, 22:12:36 UTC
Views: 186
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