CVE-2026-11042: Chrome Use-After-Free Vulnerability – Patch Chrome 149.0.7827.53

Technical summary

CVE-2026-11042 is a use-after-free vulnerability (CWE-416) in Chrome's Views subsystem. Use-after-free occurs when memory is referenced after it has been freed, allowing attackers to manipulate heap state. In this case, triggering the flaw requires user interaction—specifically UI gestures on a crafted HTML page. Successful exploitation can lead to arbitrary code execution with browser privileges. The attack vector is network-based, the attack complexity is low, and no special privileges are required, though user action is necessary. Chrome's rendering engine on multiple operating systems is affected.

Business impact

Exploitation could allow attackers to gain control of a user's browser session, steal sensitive data (credentials, session tokens, personal information), or pivot to underlying system compromise. The requirement for user interaction limits mass exploitation but remains practical in targeted phishing or drive-by attack scenarios. Organizations with Chrome-heavy workforces should prioritize patch deployment to reduce credential theft and lateral movement risks.

Affected systems

Google Chrome prior to version 149.0.7827.53 is affected. The vulnerability impacts Chrome on Windows, macOS, and Linux systems. Any user running an older version who visits a malicious webpage or is socially engineered into specific UI actions is at risk. Third-party Chromium-based browsers using vulnerable code versions may also be affected; verify with individual browser vendors.

Exploitability

The vulnerability requires user interaction to trigger, which moderately reduces opportunistic exploitation. However, the barrier to user engagement is low—a simple click or gesture on a web page is sufficient. Network-based delivery via malicious websites, ads, or phishing emails makes distribution feasible. The attack complexity is low, and no special attacker capabilities are needed beyond crafting the HTML page. The vulnerability is not currently listed on CISA's KEV catalog, suggesting it has not been observed in active exploitation campaigns as of the last update, but this does not guarantee future exploit availability.

Remediation

Update Google Chrome to version 149.0.7827.53 or later. Chrome automatically checks for updates; however, users should verify they are running the latest version by navigating to Chrome Settings > About Chrome, which will trigger an immediate check and restart if required. Organizations can enforce updates through Chrome management policies or device management solutions. For users unable to patch immediately, minimize browsing on untrusted sites and disable JavaScript for high-risk content if operationally acceptable.

Patch guidance

Google has released Chrome 149.0.7827.53 or later to address this vulnerability. Check your current Chrome version under Settings > About Chrome—the browser will automatically download and apply the patch, requiring a restart to complete installation. For enterprise deployments, verify patch distribution via your organization's device management platform and confirm rollout across all Chrome instances. Third-party Chromium-based browser vendors (Edge, Brave, Opera, etc.) will release patches on their own schedules; consult each vendor's security advisory for specific version numbers and timelines.

Detection guidance

Monitor Chrome update status across your environment to identify unpatched instances. Most modern organizations use Mobile Device Management (MDM) or endpoint detection and response (EDR) tools that can report Chrome version inventory. Network indicators are limited since the attack occurs at the application layer; however, behavioral signals such as unusual process spawning from Chrome or unexpected system calls may indicate post-exploitation activity. Focus detection efforts on identifying users who visit known malicious domains or receive phishing emails with crafted HTML attachments.

Why prioritize this

This vulnerability merits urgent patching due to its high CVSS score (8.8), low attack complexity, and potential for code execution. Although user interaction is required, the interaction threshold is minimal—a single UI gesture—making it practical for attackers to exploit in the wild. The network-based attack vector and lack of privilege requirements mean any Chrome user is a potential target. Immediate patching limits the window of exposure before exploit tools become widely available.

Risk score, explained

The CVSS 3.1 score of 8.8 (HIGH) is driven by: network-based attack vector (low attacker capability requirements), low attack complexity (no special setup needed), user interaction as the sole barrier, and complete impact across confidentiality, integrity, and availability. The scope is unchanged (impact is limited to the affected Chrome process). The score appropriately captures the severity of code execution via heap corruption, tempered by the requirement for user action. The discrepancy between Chrome's internal 'Medium' rating and the CVSS 8.8 reflects different rating methodologies; prioritize the CVSS assessment for risk decisions.

Frequently asked questions