CVE-2026-11093: Chrome Printing Cross-Origin Data Leak (CVSS 6.5)

Technical summary

CVE-2026-11093 stems from an inappropriate implementation in Chrome's printing subsystem that fails to properly isolate cross-origin content. An attacker controlling the renderer process can craft an HTML page designed to leak data across origin boundaries during the printing workflow. The vulnerability is classified under CWE-20 (Improper Input Validation), indicating that the printing code does not adequately validate or sanitize content before exposing it to data exfiltration. The CVSS v3.1 score of 6.5 (Medium) reflects a network-based attack vector with low complexity, no privileges required, but user interaction mandatory, and confidentiality impact only.

Business impact

Data breach risk is the primary business concern. If an attacker has already compromised a user's renderer process—typically through a prior vulnerability or social engineering—they can escalate harm by exfiltrating sensitive information from other origins (e.g., banking sites, email, SaaS applications) that the user accesses in the same browser session. For enterprises, this compounds the risk of multi-stage attacks where initial compromise is weaponized to steal high-value credentials or proprietary data. The lack of integrity or availability impact limits direct operational disruption, but the confidentiality risk elevates incident response costs and potential regulatory notification obligations.

Affected systems

Google Chrome prior to version 149.0.7827.53 is the primary affected product. The underlying rendering engine affects users on Windows, macOS, and Linux distributions. Chrome-based browsers that bundle or depend on the same rendering technology (including Chromium-based browsers on those operating systems) may also be vulnerable, though the advisory names Chrome specifically. Organizations relying on Chrome for secure web access in regulated industries should prioritize patching.

Exploitability

While the attack requires pre-existing renderer process compromise—a non-trivial precondition—the actual exploitation of the cross-origin data leak is straightforward once that foothold exists. No special tools, credentials, or zero-day knowledge are needed to craft the malicious HTML. The user interaction requirement (visiting a crafted page) is minimal friction for an attacker who already controls the renderer. This vulnerability is not on CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating no public evidence of active exploitation at the time of publication. However, the logical simplicity of the attack and the high value of cross-origin data mean defenders should not assume a lengthy window before weaponization.

Remediation

Update Google Chrome to version 149.0.7827.53 or later immediately. Chrome's automatic update mechanism should deliver the patch within days; administrators can verify deployment via about:version or admin dashboards in managed environments. No workarounds short of patching are available. For users who cannot update immediately, disabling printing functionality via group policy or browser extensions offers limited mitigation but does not address the root vulnerability.

Patch guidance

Verify that Chrome has updated to 149.0.7827.53 or a later stable release. On Windows, use Group Policy or the MSI installer to enforce the update. On macOS, confirm Gatekeeper and automatic update settings are enabled. On Linux, rely on distribution package managers (apt, yum, dnf) or the official Google repository. Test printing functionality after patching to ensure no regression. For enterprises, validate patch deployment against your asset inventory within 48 hours of release; prioritize user-facing systems and bring-your-own-device endpoints that may lag behind managed updates.

Detection guidance

Monitor for successful exploitation by auditing browser process memory dumps or crash logs for signs of renderer compromise preceding the printing activity. Look for unusual printing operations targeting sensitive content (e.g., repeated printing of authentication pages or form data). Cross-origin JavaScript execution during print operations is abnormal and warrants investigation. Advanced detection requires browser telemetry or endpoint detection and response (EDR) tools that can correlate renderer crashes or anomalous system calls with user web activity. For now, rely on patching velocity and user reports of suspicious browser behavior.

Why prioritize this

Although the CVSS score is medium (6.5) and exploitation requires prior renderer compromise, the attack chain is plausible in real-world breach scenarios and the confidentiality impact is severe. Attackers already inside the renderer process represent a high-value target for lateral movement and data exfiltration. The absence of KEV status suggests active exploitation is not yet widespread, but the logical simplicity and strategic value of cross-origin data theft make this a near-term risk. Prioritize patch deployment within your standard critical/high patch cycle (typically 1-2 weeks) rather than deferring to routine maintenance windows.

Risk score, explained

The CVSS 3.1 score of 6.5 appropriately reflects a medium-risk vulnerability. The network attack vector and low attack complexity favor attacker accessibility, but the requirement for pre-existing renderer compromise and user interaction cap the overall severity. Confidentiality impact is marked as high because cross-origin data can include authentication tokens, form inputs, and sensitive application data. Integrity and availability are unaffected, limiting blast radius. Organizations should adjust internal risk scores upward if they face advanced threat actors known for multi-stage attacks or if their users frequently visit high-risk websites.

Frequently asked questions