CVE-2026-87543: Missing authorization in Google Chrome
Description
A missing authorization vulnerability in Google Chrome's core prior to version 153.0.8010.36 allows a remote attacker who has compromised the renderer process to bypass site isolation using a crafted HTML page. The issue has a low security severity rating from Chromium and a CVSS score of 4.3, indicating medium severity.
CVSS v3.1
4.3medium
Affected software
Chrome
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-87543 is a vulnerability in Google Chrome before version 153.0.8010.36 where missing authorization in the browser's core enables a remote attacker, with control over the renderer process, to bypass site isolation protections by leveraging a specially crafted HTML page. This flaw could allow limited unauthorized actions but does not impact confidentiality or availability.
Potential Impact
The vulnerability allows bypassing of site isolation, which is a security feature designed to separate web content from different origins. However, the CVSS score and vendor severity classify the impact as medium to low, with no confidentiality or availability impact, and only limited integrity impact.
Mitigation Recommendations
A fix is available in Google Chrome version 153.0.8010.36. Users and administrators should update to this version or later to remediate the vulnerability. Refer to the official Google Chrome stable channel update advisory at https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0808145027.html for details.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Chrome
- Date Reserved
- 09/08/2026
- State
- PUBLISHED
- Vendor Advisory Urls
- [object Object]
Threat ID: 6aa0b17facd9273b498127df
Added to database: 09/09/2026, 01:08:15 UTC
Last enriched: 09/17/2026, 01:24:41 UTC
Last updated: 10/24/2026, 08:45:13 UTC
Views: 54
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