PatchSiren cyber security CVE debrief

CVE-2026-15902 Google CVE debrief

A use after free vulnerability was reported in Google Chrome's Cast feature prior to version 150.0.7871.128. This vulnerability could allow a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. The Chromium security severity of this issue is High, with a CVSS score of 9.6, indicating a Critical severity level. The vulnerability affects users of Google Chrome, particularly those who browse the web and may encounter crafted HTML pages. To mitigate potential risks, users should prioritize updating to the latest version of Google Chrome. The CVE record was published on 2026-07-20T23:16:55.983Z and was last modified on 2026-07-22T16:17:10.543Z.

Vendor: Google
Product: Chrome
CVSS: CRITICAL 9.6
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-07-20
Original CVE updated: 2026-07-23
Advisory published: 2026-07-20
Advisory updated: 2026-07-23

Who should care

This vulnerability affects users of Google Chrome, particularly those who browse the web and may encounter crafted HTML pages. Given the Critical severity and high CVSS score, users should prioritize updating to the latest version of Google Chrome to mitigate potential risks.

Technical summary

The CVE-2026-15902 vulnerability is a use after free issue in the Cast feature of Google Chrome. This type of vulnerability occurs when a program tries to use memory after it has been freed, which can lead to arbitrary code execution. In this case, a remote attacker could exploit this vulnerability by providing a crafted HTML page that, when visited, allows the attacker to execute arbitrary code inside the browser's sandbox. The sandbox provides some level of protection by limiting the damage that can be done, but it's still a significant risk, especially given the high CVSS score of 9.6. This issue was addressed in Google Chrome version 150.0.7871.128.

Defensive priority

High

Recommended defensive actions

Update Google Chrome to version 150.0.7871.128 or later
Ensure that all users of Google Chrome are aware of the update and apply it promptly
Monitor browser updates and security advisories for Google Chrome
Consider implementing additional security measures such as sandboxing and network segmentation
Review compensating controls for exposed systems while remediation is scheduled and verified
Check relevant monitoring, detection, and logs for exposed assets that need extra review
Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-07-20T23:16:55.983Z and was last modified on 2026-07-22T16:17:10.543Z. The NVD entry for this vulnerability is currently undergoing analysis. References provided include a stable channel update for desktop from Google's Chrome Releases blog and an issue on Chromium's issue tracker.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-20T23:16:55.983Z and has not been modified since then. The NVD entry is currently Undergoing Analysis.