---
id: CVE-2026-78949
title: >-
  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
summary: >-
  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)
severity: low
cvss: 2.9
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N'
cvssSource: adp
cwe:
  - CWE-203
vendor: Google
product: Chrome
affected:
  - Chrome >= 152.0.7977.65 < 152.0.7977.65
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-08-28T18:37:48.462983Z'
published: '2026-08-25'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T18:50:15.021Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-78949'
references:
  - url: >-
      https://chromereleases.googleblog.com/2026/08/stable-channel-update-for-desktop_0256176589.html
  - url: 'https://issues.chromium.org/issues/517910756'
tags:
  - cve.org
epss: 0.00106
epssPercentile: 0.01015
ingestedAt: '2026-09-17T19:26:25.337Z'
---

## Overview

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)

## Affected

- `Chrome >= 152.0.7977.65 < 152.0.7977.65`

## Remediation

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