CVE-2026-12437: Use after free in Google Chrome
A use-after-free vulnerability exists in the WebShare component of Google Chrome on Windows versions prior to 149.0.7827.155. This flaw could allow a remote attacker who has already compromised the renderer process to potentially escape the sandbox by using a crafted HTML page. The vulnerability is classified as critical by Chromium security. The issue affects Chrome versions before 149.0.7827.155 on Windows.
AI Analysis
Technical Summary
CVE-2026-12437 is a use-after-free vulnerability in the WebShare feature of Google Chrome on Windows platforms prior to version 149.0.7827.155. Exploitation requires prior compromise of the renderer process, after which a crafted HTML page could be used to perform a sandbox escape. This vulnerability is rated critical by Chromium security. No CVSS score is provided. The vendor advisory linked indicates a stable channel update addressing this issue, implying a fix is available in version 149.0.7827.155.
Potential Impact
Successful exploitation could allow an attacker with control over the renderer process to escape the Chrome sandbox, potentially leading to further compromise of the host system beyond the browser sandbox restrictions. This elevates the severity of the vulnerability to critical due to the potential for privilege escalation and system compromise.
Mitigation Recommendations
Users should update Google Chrome on Windows to version 149.0.7827.155 or later, where this vulnerability is fixed. The vendor advisory confirms the availability of a stable channel update addressing this issue. No additional mitigation steps are indicated by the vendor advisory.
CVE-2026-12437: Use after free in Google Chrome
Description
A use-after-free vulnerability exists in the WebShare component of Google Chrome on Windows versions prior to 149.0.7827.155. This flaw could allow a remote attacker who has already compromised the renderer process to potentially escape the sandbox by using a crafted HTML page. The vulnerability is classified as critical by Chromium security. The issue affects Chrome versions before 149.0.7827.155 on Windows.
Affected software
pkg:github/chromium/chromiumRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-12437 is a use-after-free vulnerability in the WebShare feature of Google Chrome on Windows platforms prior to version 149.0.7827.155. Exploitation requires prior compromise of the renderer process, after which a crafted HTML page could be used to perform a sandbox escape. This vulnerability is rated critical by Chromium security. No CVSS score is provided. The vendor advisory linked indicates a stable channel update addressing this issue, implying a fix is available in version 149.0.7827.155.
Potential Impact
Successful exploitation could allow an attacker with control over the renderer process to escape the Chrome sandbox, potentially leading to further compromise of the host system beyond the browser sandbox restrictions. This elevates the severity of the vulnerability to critical due to the potential for privilege escalation and system compromise.
Mitigation Recommendations
Users should update Google Chrome on Windows to version 149.0.7827.155 or later, where this vulnerability is fixed. The vendor advisory confirms the availability of a stable channel update addressing this issue. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Chrome
- Date Reserved
- 2026-06-16T19:38:23.069Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_01750511403.html","vendor":"Google"}]
Threat ID: 6a31ffc30b89be68889b012a
Added to database: 6/17/2026, 2:00:35 AM
Last enriched: 6/17/2026, 2:30:39 AM
Last updated: 6/17/2026, 4:12:27 AM
Views: 2
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