CVE-2026-87433: Race condition in Google Chrome
Description
A race condition vulnerability in the FileAPI component of Google Chrome prior to version 153.0.8010.36 allows a remote attacker who has compromised the renderer process to bypass site isolation via a crafted HTML page. This vulnerability has a high severity rating with a CVSS score of 8.8.
CVSS v3.1
Score 8.8high
Affected software
Chrome
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-87433 is a race condition vulnerability in the FileAPI of Google Chrome versions before 153.0.8010.36. It enables a remote attacker, who already has control over the renderer process, to bypass the browser's site isolation security feature by using a specially crafted HTML page. This flaw could lead to high impact on confidentiality, integrity, and availability of the affected system.
Potential Impact
Successful exploitation allows bypassing of site isolation, which can lead to unauthorized access to data across different sites within the browser process. The vulnerability impacts confidentiality, integrity, and availability, as indicated by the CVSS vector (C:H/I:H/A:H).
Mitigation Recommendations
An official 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 vendor advisory at https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0808145027.html for update details.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Chrome
- Date Reserved
- 2026-09-08T22:22:29.338Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0808145027.html","vendor":"Google"}]
Threat ID: 6aa0b16aacd9273b49810eeb
Added to database: 09/09/2026, 01:07:54 UTC
Last enriched: 09/17/2026, 01:29:15 UTC
Last updated: 10/22/2026, 13:15:24 UTC
Views: 25
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