CVE-2026-78936: Observable discrepancy in CustomTabs

Published May 27, 2026
·
Updated

Observable discrepancy in CustomTabs in Google Chrome on on Android prior to 152.0.7977.65 allowed a local attacker to obtain cross-origin data via a co-installed app. (Chromium security severity: Medium)

Credit

Google

Affected Software

2 affected componentsFixes available
Google Google Chrome<152.0.7977.65
Google Chrome<152.0.7977.64
152.0.7977.64

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 152.0.7977.64
  2. Upgrade

    Upgrade Google Chrome for Android (CustomTabs) to a version that resolves this vulnerability.

    Fixed in 152.0.7977.65

Event History

May 27, 2026
CVE Published
12:00 AM
Data Sourced
12:00 AM
SeverityWeaknessAffected Software
Aug 25, 2026
CVE Published
via MITRE·08:10 PM
Data Sourced
via MITRE·08:10 PM
DescriptionWeakness
Data Sourced
via NVD·09:17 PM
DescriptionWeakness

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

Who is realistically exposed to this issue?

Android devices running Google Chrome before 152.0.7977.65 are exposed when they have a co-installed malicious or untrusted app capable of acting as a local attacker. The issue involves CustomTabs.

2

What access does an attacker need to exploit it?

The attacker needs local presence through a co-installed app. The provided information does not indicate that a remote-only attacker can exploit the issue.

3

What is the remediation?

Update Google Chrome on Android to version 152.0.7977.65 or later. The provided data does not specify an alternative mitigation if updating is not immediately possible.

Company

Resources

Contact

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