CVE-2026-10957 Chrome Use-After-Free Vulnerability: Patch Guidance and Risk Assessment

Technical summary

CVE-2026-10957 is a use-after-free vulnerability (CWE-416) in the Glic component of Google Chrome prior to version 149.0.7827.53. The flaw allows remote code execution within the Chrome sandbox via a malicious HTML page, classified as High severity by the Chromium security team. The vulnerability has a CVSS 3.1 score of 8.8, reflecting a network-based attack vector with low complexity and no required privileges, though user interaction (clicking a malicious link or visiting a hostile site) is necessary. The attack scope is unchanged, but compromises confidentiality, integrity, and availability.

Business impact

Organizations relying on Chrome for employee productivity face potential data exfiltration and system compromise through browser-based attacks. While the sandbox provides a containment layer, a successful exploit could leak credentials, authentication tokens, or sensitive documents accessed through the browser. Organizations with bring-your-own-device or consumer-grade endpoint security may face elevated risk if users delay patching. The need for user interaction lowers the attack surface compared to pure drive-by exploits, but social engineering or link-sharing remain effective delivery vectors.

Affected systems

Google Chrome on Windows, macOS, and Linux are directly affected. Organizations using Chrome as a standard browser, particularly those with high-volume remote workforces or customer-facing web applications, should prioritize inventory and update planning. The vulnerability affects Chrome releases prior to 149.0.7827.53; verify your deployed version against this threshold.

Exploitability

The vulnerability requires crafting a malicious HTML page and convincing a user to visit it—a moderate barrier compared to zero-click exploits. No known exploit code has been publicly disclosed (KEV status is not active), reducing immediate threat intensity. However, the attack complexity is low and the payload is straightforward enough for competent threat actors to weaponize. Organizations should expect proof-of-concept or functional exploits within weeks if not already developed. The sandbox execution context provides some mitigation; full system compromise would require a secondary sandbox escape.

Remediation

Update Google Chrome to version 149.0.7827.53 or later. Chrome's auto-update mechanism should deploy the patch automatically within days, but verify completion in your environment. Organizations using managed Chrome deployments (via Chrome Enterprise or fleet management) should push the update immediately. For macOS and Linux environments, ensure patch deployment through your standard software distribution channels. Test the patch in a non-production environment first if your change control policy requires it.

Patch guidance

Verify your Chrome version via chrome://version/ in the browser address bar or through your endpoint management console. Deploy version 149.0.7827.53 or later. If using Chrome Enterprise, leverage your admin console to force deployment across managed devices. For unmanaged or BYOD endpoints, educate users to enable automatic updates and confirm completion. Check deployment success by sampling devices or using your endpoint monitoring tools to confirm version compliance. Re-check one week after the patch window to identify any stragglers or devices that failed to update.

Detection guidance

Monitor Chrome process activity for signs of unexpected code execution post-exploit—look for unusual child processes spawned from chrome.exe/chromium or abnormal network connections from the browser process. Review browser history and extensions for suspicious activity. If available, enable Chrome's security logging in your enterprise environment to capture sandbox events. Detect malicious HTML pages through web proxy logs or DNS query analysis; look for access to suspicious domains paired with Chrome browser user-agents. Endpoint Detection and Response (EDR) tools should flag use-after-free memory corruption patterns if they include behavioral YARA rules for heap exploitation.

Why prioritize this

With a CVSS score of 8.8 and straightforward exploitation mechanics (user interaction required but low attack complexity), this vulnerability merits high priority for organizations with significant Chrome deployments. The absence of KEV listing suggests this is not yet actively exploited at scale, offering a narrow window to patch before adversaries operationalize it. The sandbox execution context reduces but does not eliminate risk; a follow-up escape could compound impact. Prioritize patching for high-risk users (executives, developers, customer-facing staff) first, then roll out enterprise-wide within 30 days.

Risk score, explained

The CVSS 8.8 score reflects: (1) network-based attack vector requiring no authentication, (2) low attack complexity with no special conditions, (3) user interaction requirement (reduces from critical), (4) unchanged scope (browser sandbox boundary), and (5) high impact on all three security properties (confidentiality, integrity, availability within the sandbox context). The score is not yet critical because sandbox escape is not built-in, but the exploit is reliable and non-specialized threat actors can execute it after proof-of-concept publication.

Frequently asked questions