---
id: CVE-2026-58836
title: >-
  In handlePackagePostInstall of InstallPackageHelper.java, there is a possible
  Enhanced Confirmation Mode (ECM) bypass vulnerability that allows a sideloaded
  application to modify the package source during a self-update due to a logic
  err…
summary: >-
  In handlePackagePostInstall of InstallPackageHelper.java, there is a possible
  Enhanced Confirmation Mode (ECM) bypass vulnerability that allows a sideloaded
  application to modify the package source during a self-update due to a logic
  err…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: adp
vendor: Google
product: Android
affected:
  - Android 17
  - Android 16-qpr2
  - Android 16
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-11-02T00:00:00+00:00'
published: '2026-11-02'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T04:56:19.530Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-58836'
references:
  - url: 'https://source.android.com/docs/security/bulletin/2026/2026-11-01'
tags:
  - cve.org
epss: 0.00104
epssPercentile: 0.01041
ingestedAt: '2026-11-05T19:30:42.913Z'
---

## Overview

In handlePackagePostInstall of InstallPackageHelper.java, there is a possible Enhanced Confirmation Mode (ECM) bypass vulnerability that allows a sideloaded application to modify the package source during a self-update due to a logic error in the code. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation.

## Affected

- `Android 17`
- `Android 16-qpr2`
- `Android 16`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.