CVE-2026-7971Network attack vector

Site-isolation bypass via crafted HTML

Published May 6, 2026 · Updated May 6, 2026

Site-isolation bypass in Google Chrome before 148.0.7778.96 allows remote attackers to cross isolation boundaries via crafted HTML. Google identifies ORB as the affected locus, but the restricted issue record does not disclose which response-classification or blocking operation is implemented incorrectly. Exploitation requires the crafted page to be loaded; the published consequence is a site-isolation bypass, with no reported code execution or sandbox escape.

CVSS severity6.3
Medium
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

Site-isolation bypass in Google Chrome before 148.0.7778.96 allows remote attackers to cross isolation boundaries via crafted HTML. Google identifies ORB as the affected locus, but the restricted issue record does not disclose which response-classification or blocking operation is implemented incorrectly. Exploitation requires the crafted page to be loaded; the published consequence is a site-isolation bypass, with no reported code execution or sandbox escape.

The record

CVE
CVE-2026-7971
Published
May 6, 2026
Updated
May 6, 2026
Vendor
Go standard library
Product
Google Chrome
Classifications
CWE-269, T1189
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

6.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

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-269Improper Privilege Management
T1189Drive-by Compromise

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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