PatchSiren cyber security CVE debrief
CVE-2026-12466 Google CVE debrief
CVE-2026-12466 is a high-severity vulnerability in Google Chrome's WebRTC feature on Windows. A remote attacker can exploit this heap buffer overflow by crafting a malicious HTML page, allowing for arbitrary code execution. Google patched this issue in Chrome version 149.0.7827.155. Users should update to the latest version to mitigate this risk. This vulnerability was publicly disclosed on June 17, 2026, and the CVE record was last modified on June 18, 2026. The CVSS score for this vulnerability is 8.8, indicating a high level of severity.
- 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
This vulnerability affects users of Google Chrome on Windows. Specifically, anyone using a version prior to 149.0.7827.155 is at risk. IT administrators, cybersecurity professionals, and individual users of Google Chrome should be aware of this vulnerability and take steps to update their browsers.
Technical summary
The CVE-2026-12466 vulnerability is a heap buffer overflow in the WebRTC (Web Real-Time Communication) feature of Google Chrome on Windows. This type of vulnerability occurs when more data is written to a buffer than it is designed to hold, leading to potential memory corruption and allowing an attacker to execute arbitrary code. In this case, a remote attacker can exploit the vulnerability by crafting a malicious HTML page that, when opened in a vulnerable version of Chrome, can lead to code execution. The vulnerability has been assigned a CVSS score of 8.8, indicating a high level of severity. The CVSS vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, which means the vulnerability can be exploited over the network (AV:N), requires low attack complexity (AC:L), no privileges (PR:N), and user interaction (UI:R). A successful exploit can lead to high impacts on confidentiality (C:H), integrity (I:H), and availability (A:H).
Defensive priority
High
Recommended defensive actions
- Update Google Chrome to version 149.0.7827.155 or later.
- Ensure all users of Google Chrome on Windows are aware of this vulnerability and update their browsers.
- Implement a patch management process to ensure timely updates of Google Chrome and other critical software.
- Consider implementing additional security measures such as network segmentation and monitoring for suspicious activity.
- Educate users on safe browsing practices, including being cautious when opening links from unknown sources.
- Regularly review and update software versions to ensure they are current and patched.
Evidence notes
The information provided is based on the CVE record and NVD detail for CVE-2026-12466. The CVE record was last modified on June 18, 2026. The vulnerability was publicly disclosed on June 17, 2026. The CVSS score and vector were provided by the CVE.org and NVD sources.
Official resources
CVE-2026-12466 was publicly disclosed on June 17, 2026.