CVE-2026-95287Network attack vectorHinoki check available

Site-isolation bypass via missing navigation authorization

Published Sep 29, 2026 · Updated Sep 29, 2026

Missing authorization in Google Chrome Navigation before 154.0.8037.57 lets remote attackers bypass site isolation via crafted HTML. The Navigation component does not enforce the authorization needed to keep a compromised renderer within its site boundary; the precise code path is not public. Exploitation requires prior renderer compromise, and the published impact is a site-isolation bypass rather than a separate browser-process compromise.

CVSS severity9.1
Critical
EPSS probability0.22%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Get started

Summary

What happened

Missing authorization in Google Chrome Navigation before 154.0.8037.57 lets remote attackers bypass site isolation via crafted HTML. The Navigation component does not enforce the authorization needed to keep a compromised renderer within its site boundary; the precise code path is not public. Exploitation requires prior renderer compromise, and the published impact is a site-isolation bypass rather than a separate browser-process compromise.

The record

CVE
CVE-2026-95287
Published
Sep 29, 2026
Updated
Sep 29, 2026
Vendor
WebM Project
Product
Google Chrome
Classifications
CWE-862
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=154.0.8037.57 <154.0.8037.57

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

WebM Project · Google Chromeversion=154.0.8037.57 <154.0.8037.57

Published CVSS scores

6.4TenableAV:N/AC:L/Au:N/C:P/I:P/A:N
9.1TenableCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization

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

See the directory against your own environment.

Your stack

Check the software in your environment

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Get started