What is CVE-2026-58836 in Android?
CVE-2026-58836 is a security vulnerability located in the handlePackagePostInstall function of InstallPackageHelper.java within the Android operating system. This flaw involves a logic error that permits a sideloaded application to modify the package source during a self-update process.
As detailed in the Referencia técnica en source.android.com, this issue affects the Enhanced Confirmation Mode (ECM), bypassing intended security restrictions designed to protect package integrity during installation phases.
Who is affected by this privilege escalation risk?
The vulnerability carries a CVSS base score of 7.8, classifying it as a high-severity issue with a vector of CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. It enables local escalation of privilege, meaning an attacker with local execution privileges can compromise confidentiality, integrity, and availability.
Crucially, user interaction is not needed for exploitation, making it a critical concern for system integrity. Similar risks are often analyzed alongside Referencia técnica en source.android.com or related escalation flaws like Referencia técnica en source.android.com.
How can I protect my device against this bug?
Protecting your device requires applying the latest security patches provided by Android bulletin updates. Avoid sideloading applications from untrusted sources until patches are fully deployed on your device.
Check for system updates regularly in your device settings and follow best practices to monitor installed applications.