CVE-2026-7945Network attack vector

Site-isolation bypass via invalid COOP input

Published May 6, 2026 · Updated May 6, 2026

Insufficient input validation in Google Chrome before 148.0.7778.96 allows remote attackers to bypass site isolation via crafted HTML. The COOP component accepts untrusted input without sufficient validation, but Google's restricted issue does not disclose the exact field or validation operation. The gate is user interaction with a crafted page plus prior renderer compromise; the published assessment limits impact to confidentiality, with no integrity or availability loss.

CVSS severity3.1
Low
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient input validation in Google Chrome before 148.0.7778.96 allows remote attackers to bypass site isolation via crafted HTML. The COOP component accepts untrusted input without sufficient validation, but Google's restricted issue does not disclose the exact field or validation operation. The gate is user interaction with a crafted page plus prior renderer compromise; the published assessment limits impact to confidentiality, with no integrity or availability loss.

The record

CVE
CVE-2026-7945
Published
May 6, 2026
Updated
May 6, 2026
Vendor
Go standard library
Product
Google Chrome
Classifications
CWE-20
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 6, 2026CVE publishedPublication date reported by the CVE source.
  2. May 6, 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=148.0.7778.96 <148.0.7778.96

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · Google Chromeversion=148.0.7778.96 <148.0.7778.96

Published CVSS scores

3.1CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation

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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