CVE-2026-11025: Chrome Android CSP Bypass Vulnerability – Patch Guidance

Technical summary

CVE-2026-11025 stems from insufficient policy enforcement mechanisms in Chrome's navigation stack on Android. Content Security Policy is a critical browser security feature that restricts resource loading and script execution to prevent injection attacks. The vulnerability allows a network attacker to circumvent CSP restrictions via a specially crafted HTML page, falling under CWE-602 (Client-Side Enforcement of Server-Side Security). The attack surface is limited by the requirement for user interaction and operates within the security context of a single page (Confidentiality: None, Integrity: High, Availability: None).

Business impact

This vulnerability primarily affects organizations whose workforce uses Chrome on Android devices to access web applications that rely on CSP for protection against content injection attacks. The integrity impact means attackers could inject malicious scripts or content within supposedly-protected applications, potentially leading to credential theft, session hijacking, or malware distribution. Organizations with strict BYOD policies or those supporting Android browsing should prioritize assessment. The actual risk depends on whether your web applications are targeted and whether users' Android devices are exposed to attacker-controlled content.

Affected systems

Google Chrome on Android devices running version 149.0.7827.53 or earlier are vulnerable. Desktop Chrome and Chrome on other platforms are not affected by this specific issue. Organizations should inventory Android devices with Chrome versions below the patched release, particularly those in field support, contractor, or remote-work scenarios where device management may be limited.

Exploitability

Exploitation requires a user to visit a crafted HTML page hosted by an attacker—no network access is needed beyond standard web browsing. An attacker cannot force a victim to the malicious page without social engineering or if the page is discovered through legitimate search results. The attack does not grant remote code execution on the device itself; it specifically bypasses CSP restrictions within the browser's content isolation model. The CVSS score of 6.5 (Medium) reflects this limited but meaningful integrity impact without requiring elevated privileges or system-level access.

Remediation

Update Google Chrome on Android to version 149.0.7827.53 or later. Users can check their current version via Chrome Settings > About Chrome, which typically triggers automatic updates on Android. For organizations managing Android devices via Mobile Device Management (MDM), enforce a minimum Chrome version policy. No workarounds exist; patching is the only mitigation. Chrome's automatic update mechanism means most users will receive the fix within days, though some older or offline devices may require manual intervention.

Patch guidance

Verify that Chrome on all organization-managed or BYOD Android devices has been updated to 149.0.7827.53 or later. Enable automatic app updates in Google Play Store settings if your device management policy permits. For enterprise deployments, confirm that your MDM solution has pushed the minimum version requirement and monitor compliance. If Chrome does not auto-update within 7 days of the patch release, manually update via Google Play Store or enterprise distribution channels. Document patch confirmation in your vulnerability tracking system.

Detection guidance

Monitor Chrome version numbers across your Android device fleet using your MDM platform or mobile threat defense solution. Configure alerting for Chrome installations below version 149.0.7827.53. If your organization inspects web traffic, watch for unusual CSP violations or policy bypass attempts that correlate with Android Chrome user activity. Behavioral indicators are limited; focus on proactive version auditing rather than reactive detection. Check browser logs on endpoints if available, though most Android deployments do not retain detailed CSP violation logs.

Why prioritize this

This vulnerability merits prompt but not emergency response. The CVSS 6.5 score and Medium severity indicate meaningful risk, but the requirement for user interaction and the narrowly scoped integrity impact (CSP bypass, not RCE) place it below critical threats. Prioritize patching if your organization hosts security-sensitive web applications that rely on CSP, or if you have high Android adoption. Organizations with primarily desktop-focused workforces or those using alternative mobile browsers can deprioritize slightly, provided they audit any Android Chrome usage.

Risk score, explained

The CVSS 6.5 score reflects a network-based attack with low complexity and no privileges required, balanced against high integrity impact but no confidentiality or availability loss. The user interaction requirement (a user must visit a malicious page) prevents a fully autonomous attack and limits the attack scope to the single application context. This places the risk solidly in the Medium category—significant enough to warrant timely patching, but not an emergency that overrides other operational priorities.

Frequently asked questions