CVE-2026-79222

Local origin-policy bypass via CustomTabs authorization

Published Aug 25, 2026 · Updated Aug 25, 2026

Incorrect authorization in CustomTabs in Google Chrome on Android before 152.0.7977.65 allows local users to bypass web origin policy. Google identifies CustomTabs as the affected component but has not published which authorization decision mishandles a co-installed app's request. Exploitation requires a malicious co-installed Android app; the record establishes an origin-policy bypass but no further data-access or code-execution impact.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in CustomTabs in Google Chrome on Android before 152.0.7977.65 allows local users to bypass web origin policy. Google identifies CustomTabs as the affected component but has not published which authorization decision mishandles a co-installed app's request. Exploitation requires a malicious co-installed Android app; the record establishes an origin-policy bypass but no further data-access or code-execution impact.

The record

CVE
CVE-2026-79222
Published
Aug 25, 2026
Updated
Aug 25, 2026
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-863
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=152.0.7977.65 <152.0.7977.65

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Google Cloud · Google Chromeversion=152.0.7977.65 <152.0.7977.65

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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