CVE-2026-10015: Chrome WTF Integer Overflow RCE Vulnerability Analysis

Technical summary

CVE-2026-10015 is an integer overflow flaw (CWE-472) in Chrome's WTF component. The vulnerability exists in memory management logic where integer calculations fail to prevent overflow conditions, allowing controlled memory corruption. When triggered via malicious HTML, this can be leveraged to escape the sandbox restrictions and execute arbitrary code. The vulnerability affects Chrome on Windows, macOS, and Linux systems. Google has assigned this a High severity rating reflecting both the exploitability and impact profile.

Business impact

This vulnerability poses a significant risk to any organization where employees or users browse the web using affected Chrome versions. Successful exploitation could lead to data theft, malware installation, or lateral movement into corporate networks if the compromised browser has access to sensitive systems or credentials. The sandbox escape capability is particularly concerning, as it undermines Chrome's primary defense mechanism against malicious web content.

Affected systems

Google Chrome versions prior to 148.0.7778.216 are affected on all major operating systems: Microsoft Windows, Apple macOS, and Linux systems running the Linux kernel. Any endpoint running an unpatched version of Chrome in this version range is vulnerable to attack when users visit compromised or attacker-controlled websites.

Exploitability

Exploitation requires user interaction—specifically, the user must visit a crafted HTML page. There are no preconditions for authentication or elevated privileges. The attack vector is network-based and the exploit complexity is low, making this a practical threat in real-world attack scenarios. The remote attacker does not need any special position in the network. However, this is not currently listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, meaning active in-the-wild exploitation has not been formally documented at this time.

Remediation

Organizations should prioritize updating Google Chrome to version 148.0.7778.216 or later across all endpoints. This patch addresses the integer overflow condition and restores the sandbox as an effective containment boundary. No workarounds exist that eliminate the vulnerability itself, though disabling JavaScript or using content blockers may reduce attack surface as a temporary measure pending patching.

Patch guidance

Deploy Chrome updates via your endpoint management solution (MDM, Group Policy, or equivalent) to ensure consistent coverage. Verify that updates reach all user devices, including those operated by remote workers. Chrome's auto-update mechanism will eventually deliver the patch, but proactive deployment accelerates remediation. For enterprise environments, consider staging the update to a pilot group first to validate compatibility before full rollout. Check the official Google Chrome release notes to confirm version 148.0.7778.216 is deployed.

Detection guidance

Monitor for suspicious Chrome process behavior, including unexpected spawning of child processes or attempts to access system resources outside normal bounds. Examine browser crash logs and security event logs for evidence of exploitation attempts. While the vulnerability itself may not trigger obvious signals, post-exploitation artifacts (file creation, registry modification, network connections) should be detectable through EDR solutions. Network-based detection is difficult; focus on endpoint telemetry and log aggregation to identify compromised systems after the fact.

Why prioritize this

This vulnerability merits immediate attention despite the lack of confirmed in-the-wild exploitation. The CVSS 8.8 HIGH score reflects high impact (confidentiality, integrity, and availability all affected), low attack complexity, and only a minimal user interaction requirement. The sandbox escape capability is a critical escalation—it defeats one of Chrome's strongest security controls. Organizations should treat this as a priority patch given the ubiquity of Chrome and the practical likelihood of attack.

Risk score, explained

The CVSS 3.1 score of 8.8 (HIGH) is driven by: (1) Network-based attack vector with no authentication required, (2) low attack complexity indicating the exploit is straightforward to execute, (3) high impact across all three security properties (confidentiality, integrity, availability), and (4) the limited scope impact (User scope unchanged—the sandbox is still the containment unit). The score does not account for widespread exploitation, but the technical severity justifies the HIGH rating and urgent remediation.

Frequently asked questions