CVE-2026-91727

Sandbox escape via incorrect extension reference resolution

Published Sep 15, 2026 · Updated Sep 15, 2026

Incorrect reference resolution in Extensions in Google Chrome before 153.0.8010.47 allows local users to escape the sandbox on macOS. The public record does not identify the extension reference involved or disclose how Chrome resolves it incorrectly. Exploitation requires prior renderer compromise and a local program, after which arbitrary code executes outside the renderer sandbox.

CVSS severityUnavailable
Unscored
EPSS probability0.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect reference resolution in Extensions in Google Chrome before 153.0.8010.47 allows local users to escape the sandbox on macOS. The public record does not identify the extension reference involved or disclose how Chrome resolves it incorrectly. Exploitation requires prior renderer compromise and a local program, after which arbitrary code executes outside the renderer sandbox.

The record

CVE
CVE-2026-91727
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
Google Cloud
Product
Google Chrome
Classifications
T1068
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 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=153.0.8010.47 <153.0.8010.47

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Google Cloud · Google Chromeversion=153.0.8010.47 <153.0.8010.47

Published CVSS scores

No CVSS assessment is available in this record.

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

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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