CVE-2026-49883 Overview
CVE-2026-49883 is an information disclosure vulnerability in the Android checkReadPermission function of PermissionsManager.java. A missing permission check allows local applications to monitor sensitive device state data without holding the required privileges. Exploitation requires no user interaction and no additional execution privileges beyond installation of a malicious application. The flaw is tracked under CWE-269: Improper Privilege Management and was published in the Android Security Bulletin - September 2026.
Critical Impact
Local applications can silently monitor sensitive device state data on affected Android Wear devices, bypassing the permission model designed to gate that information.
Affected Products
- Android Wear (per September 2026 Security Bulletin)
- Android platform components implementing PermissionsManager.java
- Devices pending the September 2026 Android security patch level
Discovery Timeline
- 2026-09-08 - CVE-2026-49883 published to NVD
- 2026-09-10 - Last updated in NVD database
Technical Details for CVE-2026-49883
Vulnerability Analysis
The vulnerability resides in the checkReadPermission method of PermissionsManager.java, a core component that gates read access to device state data on Android. The method is expected to verify that a calling application holds the appropriate permission before returning or exposing sensitive state information. Because the check is missing or incomplete, callers that lack the required permission can still observe the protected data.
The outcome is local information disclosure. An installed application on an affected device can read device state that should be limited to system components or privileged applications. No user prompt, consent dialog, or foreground activity is required, making the condition observable to background processes.
The issue is classified as CWE-269: Improper Privilege Management. The root defect is a control-flow gap: the code path that returns sensitive data does not enforce the permission gate the surrounding API contract implies.
Root Cause
The root cause is a missing permission check in checkReadPermission. The method fails to reject callers that do not hold the permission associated with the sensitive device state data. As a result, the permission model that Android relies on to separate application privileges is bypassed for this specific read path.
Attack Vector
Exploitation is local. A malicious application installed on the device invokes the affected API surface reachable through PermissionsManager.java. Because checkReadPermission does not enforce the required permission, the caller receives the sensitive device state data. The attack requires no user interaction, no elevated privileges at install time, and no additional exploitation primitives.
No public proof-of-concept has been published for CVE-2026-49883. Technical details are limited to the Android Security Bulletin - September 2026.
Detection Methods for CVE-2026-49883
Indicators of Compromise
- Installed applications querying device state APIs without holding the corresponding declared permissions in their manifest.
- Unexpected background processes on Android Wear devices repeatedly polling PermissionsManager-mediated interfaces.
- Third-party applications reading device state data that historically required system-level access.
Detection Strategies
- Audit installed application manifests against runtime API access patterns to identify permission-to-behavior mismatches.
- Review mobile threat defense telemetry for applications that access device state data without a matching permission grant.
- Correlate application install events with subsequent access to sensitive device state readers.
Monitoring Recommendations
- Track the Android security patch level on managed Wear and mobile devices and flag devices below the September 2026 patch level.
- Monitor enterprise app catalogs for sideloaded APKs and unverified distribution sources.
- Ingest mobile device logs into a centralized data lake to enable retroactive hunting once vendor-specific detection signatures become available.
How to Mitigate CVE-2026-49883
Immediate Actions Required
- Apply the September 2026 Android security patch level to all managed Android and Android Wear devices.
- Enforce mobile device management policies that block installation of applications from unknown sources.
- Inventory devices that cannot receive the September 2026 patch and restrict access to sensitive corporate resources from those devices.
Patch Information
Google addressed the missing permission check in the September 2026 Android Security Bulletin. Device manufacturers and carriers ship the fix as part of the 2026-09-01 or later security patch level. Refer to the Android Security Bulletin - September 2026 for the authoritative patch reference and affected component list.
Workarounds
- Restrict installation of third-party applications on affected devices until the patch is applied.
- Use enterprise mobility management to enforce allowlists of vetted applications on Android Wear devices.
- Segment devices lacking the September 2026 patch level from networks and services handling sensitive data.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.