CVE-2026-9882: Chrome ANGLE Integer Overflow Allows Cross-Origin Data Leakage

Technical summary

An integer overflow vulnerability (CWE-190) exists in ANGLE, the cross-platform graphics abstraction layer integrated into Chrome. The flaw is compounded by an improper restriction of rendered UI layers to intended endpoints (CWE-472), allowing an attacker to craft malicious HTML/JavaScript that triggers the overflow condition and reads memory belonging to other origins. The vulnerability is triggered through normal browser interaction—rendering a hostile page—without requiring network capabilities beyond standard HTTP/HTTPS. The integer overflow occurs in a graphics-related code path, likely during texture or buffer processing, where bounds checking fails and permits out-of-bounds memory access. This memory can leak sensitive cross-origin data (session tokens, personal information, authentication details) to the attacker's origin.

Business impact

Organizations must weigh three key risks: (1) User credential compromise if employees visit untrusted sites, enabling attackers to steal authentication tokens or session data; (2) Data leakage from web applications if those applications can be framed or accessed by a page controlled by an attacker; (3) Supply-chain exposure if legitimate websites are compromised and used to host exploit payloads. Browsers are the enterprise perimeter in many organizations, making this a significant attack surface. The requirement for user interaction means targeted spear-phishing campaigns or drive-by compromises of popular sites pose the greatest risk. For SaaS platforms and cloud applications, this can enable account takeover or sensitive data exfiltration.

Affected systems

This vulnerability affects Google Chrome versions prior to 148.0.7778.216 on Windows, macOS, and Linux. While ANGLE is a graphics library, all Chrome browsers on affected operating systems that have not received the security update are vulnerable. The Linux kernel is listed as an affected vendor/product, though the vulnerability itself is Chrome-specific; this may reflect packaging or indirect exposure. Organizations should inventory Chrome deployments across all platforms and prioritize updates for machines with users accessing sensitive web applications or untrusted sites.

Exploitability

Exploitation is considered moderately feasible but requires user interaction. An attacker must trick a user into visiting or rendering a malicious HTML page—via phishing, compromised advertising networks, watering-hole attacks, or social engineering. Once rendered, the exploit is deterministic and does not depend on operating system or architecture variations; ANGLE abstracts those differences. There is no evidence of public exploits or widespread in-the-wild exploitation at this time (KEV status is false), but the attack is feasible enough that defenders should not assume it remains theoretical. The barrier to entry is low for experienced web-based attack developers.

Remediation

Update Google Chrome to version 148.0.7778.216 or later immediately. This patch addresses the integer overflow by fixing bounds checking in the affected ANGLE code path. For organizations with managed Chrome deployments (via Chromium Enterprise, Google Workspace, or MDM solutions), push the update through your update management system with high priority. For consumer or unmanaged Chrome instances, enable automatic updates or manually verify that Chrome is fully patched by checking Settings > About Chrome. If automatic updates are not possible, consider blocking or warning users when accessing untrusted external sites until patching is complete.

Patch guidance

Verify that deployed Chrome instances have reached version 148.0.7778.216 or higher. You can check Chrome version by navigating to chrome://version/ or checking the About Chrome menu. For enterprise deployments, use your MDM console or Group Policy (Windows) to enforce the update and confirm compliance. Rollout can proceed immediately without staged deployment, as this is a security patch with no known compatibility issues. Test the update on a representative sample before full rollout only if your organization has strict change control; otherwise, prioritize speed. Monitor Chrome auto-update settings and consider disabling user controls to update if they are currently permitted; however, be aware of end-user frustration from forced restarts. Set a compliance deadline (e.g., within 72 hours) and escalate non-compliant systems to IT/endpoint management teams.

Detection guidance

Detection of exploitation is challenging post-compromise because the vulnerability operates in-process and leaves no traditional audit trail. However, you can implement preventive measures: (1) Monitor and restrict access to external websites that are known or suspected to host exploit payloads using web proxy logs or DNS telemetry; (2) Deploy Content Security Policy (CSP) headers and X-Frame-Options on internal applications to reduce cross-origin attack surface; (3) Monitor browser crash logs and GPU process crashes, as failed exploitation attempts may generate diagnostic data; (4) Track successful Chrome updates via SCCM, MDM, or endpoint logs to ensure coverage. Detection of the attack itself (data exfiltration) is best addressed through network egress controls—monitor for unexpected outbound connections from employee machines to attacker infrastructure, and implement outbound TLS inspection to detect data ex-filtration patterns.

Why prioritize this

Despite a CVSS score of 6.5 (Medium), this vulnerability merits urgent prioritization for three reasons: (1) Chrome's ubiquity—nearly all knowledge workers use it, multiplying attack surface; (2) The attack targets authentication and confidentiality, two pillars of security hygiene; (3) Exploitation requires only a single user action, making human error a primary control failure. Organizations should treat this as High priority for endpoint remediation. The gap between Chromium's "Critical" rating and CVSS 6.5 reflects CVSS's conservative scoring methodology, which penalizes user interaction; real-world risk is higher because user interaction is the norm in web browsing. Prioritize systems whose users access sensitive SaaS platforms, financial services, or identity/access management systems.

Risk score, explained

The CVSS 3.1 base score of 6.5 is derived from: Attack Vector (Network), Attack Complexity (Low), Privileges Required (None), User Interaction (Required), Scope (Unchanged), Confidentiality (High), Integrity (None), Availability (None). The score reflects a flaw that requires network reachability, is trivial to exploit once triggered, demands no escalated privileges, but crucially requires a user to interact with the malicious content. The lack of Integrity or Availability impact limits the score; this is a data disclosure flaw, not remote code execution. However, the high confidentiality impact and ubiquity of affected software warrant elevated risk management decision-making independent of the CVSS score.

Frequently asked questions