PatchSiren cyber security CVE debrief
CVE-2026-12443 Google CVE debrief
CVE-2026-12443 is a critical use-after-free vulnerability in Google Chrome's Web Authentication feature. The vulnerability, which was published on June 17, 2026, allows remote attackers to execute arbitrary code via a crafted HTML page. The CVSS score for this vulnerability is 8.8, indicating a high severity. Google Chrome versions prior to 149.0.7827.155 are affected by this vulnerability. Users should update to the latest version to mitigate the risk. This vulnerability was reported by an unknown vendor, and its details are still being analyzed.
- Vendor
- Product
- Chrome
- CVSS
- HIGH 8.8
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-06-17
- Original CVE updated
- 2026-06-18
- Advisory published
- 2026-06-17
- Advisory updated
- 2026-06-18
Who should care
Users of Google Chrome, particularly those who use the browser for sensitive activities, should be aware of this vulnerability and update to the latest version as soon as possible. Additionally, security teams and administrators responsible for managing Chrome deployments should prioritize patching to prevent potential attacks.
Technical summary
The vulnerability is a use-after-free issue in the Web Authentication feature of Google Chrome. This type of vulnerability occurs when a program attempts to use memory after it has been freed, allowing an attacker to potentially execute arbitrary code. In this case, an attacker can create a crafted HTML page that triggers the vulnerability, allowing them to execute arbitrary code on the affected system. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, indicating that the vulnerability can be exploited over the network with low attack complexity and no privileges required.
Defensive priority
high
Recommended defensive actions
- Update Google Chrome to version 149.0.7827.155 or later
- Use a web browser with built-in security features, such as Microsoft Edge or Mozilla Firefox
- Implement a web application firewall (WAF) to detect and prevent attacks
- Conduct regular vulnerability scans and patch management
- Use a secure search engine and avoid suspicious links
- Monitor system logs for suspicious activity
Evidence notes
The details of this vulnerability are based on information from the National Vulnerability Database (NVD) and the Google Chrome release blog. The vulnerability is still being analyzed, and additional information may be added as it becomes available. The CVE record and NVD detail pages provide further information on this vulnerability.
Official resources
public