CVE-2026-12437
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Use After Free in Google Chrome WebShare on Windows

Publication date: 2026-06-17

Last updated on: 2026-06-17

Assigner: Chrome

Description
Use after free in WebShare in Google Chrome on Windows prior to 149.0.7827.155 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)
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Meta Information
Published
2026-06-17
Last Modified
2026-06-17
Generated
2026-06-17
AI Q&A
2026-06-17
EPSS Evaluated
N/A
NVD
CVE-2026-12437
EUVD
EUVD-2026-37522
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
google chrome to 149.0.7827.155 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-416 The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
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Executive Summary

This vulnerability is a use-after-free issue in the WebShare component of Google Chrome on Windows versions prior to 149.0.7827.155. It allows a remote attacker who has already compromised the renderer process to potentially escape the browser's sandbox by using a specially crafted HTML page.

Impact Analysis

If exploited, this vulnerability can allow an attacker to escape the sandbox environment of the browser, which is designed to isolate web content and limit its access to the system. This could lead to the attacker gaining higher privileges on the affected system, potentially resulting in full system compromise, data theft, or installation of malicious software.

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