PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-12455 Google CVE debrief

CVE-2026-12455 is a high-severity use after free vulnerability in Google Chrome's Tab Strip feature. This PatchSiren debrief provides an AI-assisted analysis of the CVE record and available source details. The vulnerability allows a remote attacker to potentially exploit heap corruption via a crafted HTML page by convincing a user to engage in specific UI gestures. Users of Google Chrome, particularly those who engage in high-risk browsing activities or handle sensitive data, should be aware of this vulnerability and take steps to update their browser to the latest version.

Vendor
Google
Product
Chrome
CVSS
HIGH 7.5
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 engage in high-risk browsing activities or handle sensitive data, should be aware of this vulnerability and take steps to update their browser to the latest version. IT administrators and security teams should prioritize patching and monitoring for potential exploitation.

Technical summary

CVE-2026-12455 is a use after free vulnerability in the Tab Strip feature of Google Chrome prior to version 149.0.7827.155. An attacker could potentially exploit heap corruption via a crafted HTML page by convincing a user to engage in specific UI gestures. The vulnerability has a high severity and is being actively monitored by defenders. Users of Google Chrome, particularly those who engage in high-risk browsing activities or handle sensitive data, should be aware of this vulnerability and take steps to update their browser to the latest version. IT administrators and security teams should prioritize patching and monitoring for potential exploitation. Due to limited source detail, defenders should verify the affected scope and severity with official advisories.

Defensive priority

High

Recommended defensive actions

  • Update Google Chrome to version 149.0.7827.155 or later
  • Implement compensating controls, such as monitoring for suspicious browser activity
  • Conduct regular inventory checks to ensure all Chrome instances are up-to-date
  • Review 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
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
  • Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed

Evidence notes

The CVE record for CVE-2026-12455 was published on 2026-06-17T13:20:01.070Z and last modified on 2026-06-18T04:16:41.407Z. The NVD entry is currently Analyzed. However, due to limited source detail, defenders should verify the affected scope and severity with official advisories. The vulnerability affects Google Chrome prior to version 149.0.7827.155. Users should be cautious when engaging in high-risk browsing activities or handling sensitive data.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-06-17T13:20:01.070Z and has not been modified since then. The NVD entry is currently Analyzed.