CVE-2026-79152

Local origin-policy bypass via CustomTabs authorization

Published Aug 25, 2026 · Updated Aug 25, 2026

Incorrect authorization in Google Chrome for Android before 152.0.7977.65 allows local users to bypass web origin policy. The flaw is in CustomTabs, but Google has not disclosed which authorization decision improperly accepts input or identity from a co-installed app. Exploitation requires a malicious app installed on the same Android device; published sources establish cross-origin policy bypass but do not specify the exposed web data or permitted actions.

CVSS severityUnavailable
Unscored
EPSS probability0.24%
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 Google Chrome for Android before 152.0.7977.65 allows local users to bypass web origin policy. The flaw is in CustomTabs, but Google has not disclosed which authorization decision improperly accepts input or identity from a co-installed app. Exploitation requires a malicious app installed on the same Android device; published sources establish cross-origin policy bypass but do not specify the exposed web data or permitted actions.

The record

CVE
CVE-2026-79152
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.

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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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