CVE-2026-11269

Sandboxed code execution via crafted extension

Published Jun 4, 2026 · Updated Jun 4, 2026

Inappropriate implementation in Chrome Extensions before 149.0.7827.53 allows attackers to execute sandboxed code via a crafted extension. Google's public advisory and restricted issue do not disclose the faulty Extensions code path or the incorrect operation performed on extension input. Exploitation requires a privileged network position and user interaction with the crafted extension; execution remains inside Chrome's sandbox.

CVSS severity7.1
High
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Inappropriate implementation in Chrome Extensions before 149.0.7827.53 allows attackers to execute sandboxed code via a crafted extension. Google's public advisory and restricted issue do not disclose the faulty Extensions code path or the incorrect operation performed on extension input. Exploitation requires a privileged network position and user interaction with the crafted extension; execution remains inside Chrome's sandbox.

The record

CVE
CVE-2026-11269
Published
Jun 4, 2026
Updated
Jun 4, 2026
Vendor
Go standard library
Product
Google Chrome
Classifications
CWE-829, T1204.002
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 4, 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=149.0.7827.53 <149.0.7827.53

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Go standard library · Google Chromeversion=149.0.7827.53 <149.0.7827.53

Published CVSS scores

7.1CISA-ADPCVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-829Inclusion of Functionality from Untrusted Control Sphere
T1204.002Malicious File

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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