CVE-2026-87541Network attack vector

Cross-site information disclosure via navigation isolation bypass

Published Sep 9, 2026 · Updated Sep 10, 2026

Information leak in Google Chrome before 153.0.8010.36 allows remote attackers with a compromised renderer to bypass Site Isolation. The Navigation component permits a crafted HTML page to cross a Site Isolation boundary; Google has not disclosed the responsible function or validation error because bug details remain restricted. Exploitation therefore requires a separate renderer compromise, and the demonstrated consequence is cross-site information exposure rather than code execution or a sandbox escape.

CVSS severity6.5
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information leak in Google Chrome before 153.0.8010.36 allows remote attackers with a compromised renderer to bypass Site Isolation. The Navigation component permits a crafted HTML page to cross a Site Isolation boundary; Google has not disclosed the responsible function or validation error because bug details remain restricted. Exploitation therefore requires a separate renderer compromise, and the demonstrated consequence is cross-site information exposure rather than code execution or a sandbox escape.

The record

CVE
CVE-2026-87541
Published
Sep 9, 2026
Updated
Sep 10, 2026
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-200
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 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=153.0.8010.36 <153.0.8010.36

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Google Cloud · Google Chromeversion=153.0.8010.36 <153.0.8010.36

Published CVSS scores

5.8TenableAV:N/AC:M/Au:N/C:P/I:P/A:N
6.5TenableCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor

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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