CVE-2026-11073: Chrome WebGL Use-After-Free Information Disclosure

Technical summary

CVE-2026-11073 is a use-after-free vulnerability (CWE-416) in the WebGL subsystem of Google Chrome. Use-after-free flaws occur when code attempts to access memory that has already been freed, allowing an attacker to read or manipulate that memory region. In this case, a specially crafted HTML page can trigger the vulnerability, causing the browser to access freed memory in the WebGL context. An attacker positioned to serve such a page can potentially exfiltrate sensitive data residing in the affected process's memory space. The Chromium security team classified this as Medium severity, reflecting the requirement for user interaction and the read-only nature of the information disclosure.

Business impact

For organizations where employees use Chrome as their primary browser, this vulnerability poses a data exfiltration risk. If a user visits a malicious site, attackers could harvest sensitive information cached in browser memory—including session tokens, authentication credentials, or business data. This is particularly concerning in environments where Chrome is used to access internal applications or cloud services. The attack requires no special privileges and relies only on social engineering or compromised web content to succeed. However, the exposure is limited to the individual user's browser process and does not enable system-wide compromise.

Affected systems

Google Chrome versions prior to 149.0.7827.53 are vulnerable. The CVE also lists macOS, Linux kernel, and Windows as affected platforms, indicating that Chrome on all major desktop operating systems is in scope. Organizations should verify Chrome versions across their user base. Note that while multiple operating systems are listed, the vulnerability is specific to the Chrome browser itself; the underlying OS version does not determine exposure—only the Chrome version does.

Exploitability

The vulnerability requires user interaction: a victim must be tricked into visiting or viewing a crafted HTML page. There is no network-based trigger or automatic exploitation mechanism. The attacker cannot trigger the flaw through drive-by downloads or without user engagement, which provides some natural friction. However, exploitability is otherwise straightforward—no special browser extensions, JavaScript restrictions, or advanced browser features need to be disabled. The threat is elevated in scenarios where attackers can inject content into legitimate websites or where users are socially engineered to visit attacker-controlled domains.

Remediation

Update Google Chrome to version 149.0.7827.53 or later. Chrome's auto-update mechanism typically deploys patches automatically, but users and administrators should verify that the browser has updated and restarted to apply the fix. Organizations with managed Chrome deployments should confirm patch rollout through their mobile device management (MDM) or endpoint management platform. No configuration changes or workarounds are available; patching is the only remediation.

Patch guidance

Deploy Chrome version 149.0.7827.53 or later across your organization. If you manage Chrome through an enterprise policy console, verify that auto-update policies are enabled and that devices have checked in recently. For unmanaged or BYOD scenarios, communicate the importance of Chrome updates to end users. Consider blocking or warning users accessing untrusted websites as a temporary mitigation while patches roll out. Verify patch deployment by checking Chrome's About menu (chrome://settings/help) on a sample of user devices; the browser should report the current version and confirm that it is up to date.

Detection guidance

At the endpoint level, monitor for Chrome processes accessing freed memory or triggering segmentation faults—though these signals are difficult to capture in real-time without deep binary instrumentation. More practically, monitor for suspicious WebGL-heavy activity or crashes in Chrome, which may indicate exploitation attempts. On the network side, watch for users accessing unfamiliar or newly registered domains known to host malware or exploit kits. Logging of Chrome crash reports (if enabled in your organization) may surface exploitation patterns. Note that successful exploitation is invisible at the network layer since only memory read operations occur; detection relies primarily on patching verification and endpoint telemetry.

Why prioritize this

This vulnerability merits prompt but not emergency patching. The CVSS score of 6.5 reflects a meaningful confidentiality impact coupled with the requirement for user interaction. It is not listed on CISA's Known Exploited Vulnerabilities (KEV) catalog, meaning there is no evidence of active exploitation in the wild at the time of publication. However, memory disclosure flaws are attractive to sophisticated attackers, and the simplicity of exploitation increases the risk over time. Organizations should prioritize deployment within a standard patch cycle (1–2 weeks), with higher urgency in environments where Chrome users access sensitive business applications or personal data.

Risk score, explained

The CVSS 3.1 score of 6.5 (Medium severity) reflects: a network-accessible attack vector (AV:N) with low attack complexity (AC:L) and no privileges required (PR:N), balanced against the requirement for user interaction (UI:R). The impact is limited to confidentiality (C:H), with no integrity or availability impact. The attacker gains read-only access to process memory, not full system compromise. The score appropriately penalizes the user-interaction requirement while recognizing the sensitivity of exposed data. For risk prioritization, pair this score with your organization's exposure: high if many users visit untrusted sites; lower if browsing is tightly controlled.

Frequently asked questions