CVE-2026-95355Network attack vector

Sandbox escape via forged error-page navigation

Published Sep 29, 2026 · Updated Sep 29, 2026

Incorrect authorization in Google Chrome on iOS before 154.0.8037.57 lets remote attackers with a compromised renderer escape the sandbox. The iOS navigation handler accepts a forged internal error-page URL without verifying that the browser initiated it, then permits navigation to privileged WebUI. Exploitation requires prior renderer compromise and delivery through a crafted HTML page; this flaw crosses the renderer sandbox boundary.

CVSS severity9.1
Critical
EPSS probability0.39%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Google Chrome on iOS before 154.0.8037.57 lets remote attackers with a compromised renderer escape the sandbox. The iOS navigation handler accepts a forged internal error-page URL without verifying that the browser initiated it, then permits navigation to privileged WebUI. Exploitation requires prior renderer compromise and delivery through a crafted HTML page; this flaw crosses the renderer sandbox boundary.

The record

CVE
CVE-2026-95355
Published
Sep 29, 2026
Updated
Sep 29, 2026
Vendor
WebM Project
Product
Google Chrome
Classifications
CWE-863, T1068
Attack vector
network
Privileges
unauthenticated

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

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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=154.0.8037.57 <154.0.8037.57

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WebM Project · Google Chromeversion=154.0.8037.57 <154.0.8037.57

Published CVSS scores

9.1TenableCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
6.4TenableAV:N/AC:L/Au:N/C:P/I:P/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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