Cross-User Permission Bypass in Android App Due to Misconfiguration
CVE-2026-0021

8.4HIGH

Key Information:

Vendor

Google
Status
Android
Vendor
CVE Published:
2 March 2026

What is CVE-2026-0021?

A vulnerability in the hasInteractAcrossUsersFullPermission function within AppInfoBase.java exposes a potential cross-user permission bypass. This issue stems from a confused deputy problem, allowing a local escalation of privilege without requiring additional execution privileges. There is no need for user interaction to exploit this vulnerability, making it particularly concerning for app security.

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Affected Version(s)

Android 16-qpr2

Android 16

Android 15

References

https://source.android.com/docs/security/bulletin/2026/20...
vendor-advisory

CVSS V3.1

Score:
8.4
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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