CVE-2026-79117Network attack vector

Origin-policy bypass via misbound TWA launch parameters

Published Aug 25, 2026 · Updated Aug 25, 2026

Race condition in Google Chrome on Android before 152.0.7977.65 allows remote attackers to bypass web origin policy via a co-installed app. WebAppInstalls stores Trusted Web Activity launch parameters in one pending field and binds them to the next main-frame navigation without final URL scope enforcement. Exploitation requires social engineering, a co-installed Android app, and winning the asynchronous verification race; successful exploitation can deliver launch parameters across an origin boundary.

CVSS severity5.3
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in Google Chrome on Android before 152.0.7977.65 allows remote attackers to bypass web origin policy via a co-installed app. WebAppInstalls stores Trusted Web Activity launch parameters in one pending field and binds them to the next main-frame navigation without final URL scope enforcement. Exploitation requires social engineering, a co-installed Android app, and winning the asynchronous verification race; successful exploitation can deliver launch parameters across an origin boundary.

The record

CVE
CVE-2026-79117
Published
Aug 25, 2026
Updated
Aug 25, 2026
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-362
Attack vector
network
Privileges
unauthenticated

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 vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=152.0.7977.65 <152.0.7977.65

Published CVSS scores

5.3TenableCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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