CVE-2026-57978: CWE-346: Origin Validation Error in Microsoft Microsoft Edge (Chromium-based)
CVE-2026-57978 is an origin validation error vulnerability in Microsoft Edge (Chromium-based) that allows an unauthorized attacker to perform spoofing over a network. The vulnerability has a medium severity with a CVSS score of 5.4. An official fix is available from Microsoft to address this issue.
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 spoof content or origins over a network due to improper origin validation. The vulnerability has been assigned CVE-2026-57978 and is rated medium severity with a CVSS 3.1 base score of 5.4. Microsoft has published an official fix for this vulnerability, as detailed in their security advisory.
Potential Impact
The vulnerability enables an unauthorized attacker to perform spoofing attacks over a network, potentially misleading users or systems by presenting forged origin information. The impact includes limited confidentiality and integrity loss but no availability impact. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57978 to remediate this vulnerability.
CVE-2026-57978: CWE-346: Origin Validation Error in Microsoft Microsoft Edge (Chromium-based)
Description
CVE-2026-57978 is an origin validation error vulnerability in Microsoft Edge (Chromium-based) that allows an unauthorized attacker to perform spoofing over a network. The vulnerability has a medium severity with a CVSS score of 5.4. An official fix is available from Microsoft to address this issue.
CVSS v3.1
Score 5.4medium
Affected software
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 spoof content or origins over a network due to improper origin validation. The vulnerability has been assigned CVE-2026-57978 and is rated medium severity with a CVSS 3.1 base score of 5.4. Microsoft has published an official fix for this vulnerability, as detailed in their security advisory.
Potential Impact
The vulnerability enables an unauthorized attacker to perform spoofing attacks over a network, potentially misleading users or systems by presenting forged origin information. The impact includes limited confidentiality and integrity loss but no availability impact. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57978 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-26T17:45:44.853Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57978","vendor":"Microsoft"}]
Threat ID: 6a6642749c2644c7f8208cbd
Added to database: 07/26/2026, 17:23:00 UTC
Last enriched: 07/26/2026, 17:36:57 UTC
Last updated: 07/26/2026, 17:50:22 UTC
Views: 4
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