CVE-2026-9903
Site Isolation Bypass via Crafted MHTML in Google Chrome
Publication date: 2026-05-28
Last updated on: 2026-05-28
Assigner: Chrome
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| chrome | 148.0.7778.216 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-20 | The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability involves insufficient validation of untrusted input in the Site Isolation feature of Google Chrome versions prior to 148.0.7778.216. It allows a remote attacker who has already compromised the renderer process to bypass site isolation by using a specially crafted MHTML page.
How can this vulnerability impact me? :
An attacker exploiting this vulnerability can bypass site isolation protections in Google Chrome, potentially allowing them to access or manipulate data from other sites or processes that should be isolated. This could lead to unauthorized data access or compromise of browser security.