CVE-2026-10009: Chrome Skia Integer Overflow Sandbox Escape – Patch Guidance

Technical summary

CVE-2026-10009 is an integer overflow vulnerability (CWE-472) in the Skia graphics library component of Google Chrome. The flaw exists in code executed by the renderer process, which operates within a sandbox. An attacker with an existing foothold in the renderer process can craft a malicious HTML page that triggers the integer overflow during graphics rendering, leading to memory corruption and arbitrary code execution within the sandbox environment. The vulnerability has a CVSS 3.1 score of 7.5 (High), reflecting the requirement for renderer process compromise and user interaction as mitigating factors, offset by the potential for high-impact code execution.

Business impact

Organizations relying on Chrome as their primary browser face sandbox escape risk if users visit malicious or compromised websites. While the sandbox constrains damage, successful exploitation could enable data theft from browser memory, installation of persistent malware, or lateral movement if combined with operating system vulnerabilities. The vulnerability is particularly concerning in environments where Chrome is used to access sensitive internal systems or where user browsing cannot be strictly controlled.

Affected systems

Google Chrome versions prior to 148.0.7778.216 are vulnerable. The vulnerability affects Chrome running on Microsoft Windows, Apple macOS, and Linux operating systems. All major desktop platforms are impacted; mobile Chrome versions may have different version numbers and update schedules—verify platform-specific patch availability from Google.

Exploitability

Exploitation requires two preconditions: first, an attacker must already have compromised the Chrome renderer process (perhaps through a prior browser vulnerability or malicious extension), and second, the victim must interact with a crafted HTML page, such as by visiting an attacker-controlled or compromised website. This two-stage requirement moderates overall exploitability, though the attack chain is realistic in targeted scenarios. No public exploit code has been documented in the Known Exploited Vulnerabilities (KEV) catalog, and the vulnerability is not yet confirmed in active threat campaigns at the time of publication.

Remediation

Update Google Chrome to version 148.0.7778.216 or later immediately. Chrome's auto-update mechanism typically deploys patches automatically, but verification is recommended in environments with update management policies. Users should also review their browser extensions and policies to minimize the risk of renderer process compromise by malicious or supply-chain-compromised extensions.

Patch guidance

Deploy Chrome version 148.0.7778.216 or newer across your organization. Most users will receive updates automatically; however, verify deployment in environments with managed Chrome policies, enterprise deployments, or organizations using browser update management tools. Confirm patch application through Chrome's About menu (chrome://settings/help) or via endpoint management tools. No known workarounds exist short of disabling or isolating the Chrome browser entirely.

Detection guidance

Monitor for unusual Chrome process behavior, including unexpected child process spawning, memory access patterns, or outbound network connections from renderer processes. Browser sandbox telemetry and operating system audit logs may reveal exploitation attempts. Organizations using endpoint detection and response (EDR) tools should enable behavioral monitoring for graphics library calls and memory corruption indicators. Network detection is limited because the attack occurs entirely within a local renderer process.

Why prioritize this

Although the CVSS score is 7.5 (High) and not Critical, the practical risk depends on your environment. Prioritize patching if your organization allows users to browse untrusted websites or if you host web applications that internal users access via Chrome. If browsing is heavily restricted or sandboxed at the network level, prioritization can be moderate. However, the sandbox-escape capability elevates this above a routine browser vulnerability and warrants prompt patching within your standard maintenance windows.

Risk score, explained

The CVSS 3.1 score of 7.5 reflects High severity due to the potential for arbitrary code execution with high confidentiality, integrity, and availability impact. The score is moderated by the requirement for renderer process compromise (reducing attack surface) and user interaction (UI:R), as well as the sandbox constraint (S:U). The attack vector is network-based (AV:N) and does not require authentication (PR:N), but the combination of prerequisites prevents a Critical rating.

Frequently asked questions