CVE-2026-15131Network attack vector

Site isolation bypass via Navigation input validation

Published Jul 8, 2026 · Updated Jul 8, 2026

Insufficient data validation in Google Chrome Navigation before 150.0.7871.115 allows remote attackers to bypass site isolation via crafted HTML. Google identifies the locus as Navigation but has not published which input is accepted incorrectly or how the validation failure crosses an isolation boundary. Exploitation requires a user to open the crafted page; the published impact is limited to low-confidentiality exposure, with no integrity or availability impact.

CVSS severity4.3
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient data validation in Google Chrome Navigation before 150.0.7871.115 allows remote attackers to bypass site isolation via crafted HTML. Google identifies the locus as Navigation but has not published which input is accepted incorrectly or how the validation failure crosses an isolation boundary. Exploitation requires a user to open the crafted page; the published impact is limited to low-confidentiality exposure, with no integrity or availability impact.

The record

CVE
CVE-2026-15131
Published
Jul 8, 2026
Updated
Jul 8, 2026
Vendor
Go standard library
Product
Google Chrome
Classifications
CWE-20, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 8, 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=150.0.7871.115 <150.0.7871.115

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · Google Chromeversion=150.0.7871.115 <150.0.7871.115

Published CVSS scores

4.3CISACVSS:3.1/AV:N/AC:L/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 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-20CWE-20 Improper Input Validation
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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