CVE-2026-87470Network attack vector

Sandbox escape via unpadded Metal workgroup allocation

Published Sep 9, 2026 · Updated Sep 10, 2026

Improper quantity validation in Tint in Google Chrome before 153.0.8010.36 on macOS allows remote attackers to execute code outside the sandbox. The MSL writer supplied Metal with an unpadded workgroup allocation size even when the generated wrapper structure required additional alignment. Exploitation requires a user to load crafted HTML that reaches the macOS WebGPU and Metal path, after which attacker-controlled code can escape Chrome sandbox containment.

CVSS severity9.6
Critical
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper quantity validation in Tint in Google Chrome before 153.0.8010.36 on macOS allows remote attackers to execute code outside the sandbox. The MSL writer supplied Metal with an unpadded workgroup allocation size even when the generated wrapper structure required additional alignment. Exploitation requires a user to load crafted HTML that reaches the macOS WebGPU and Metal path, after which attacker-controlled code can escape Chrome sandbox containment.

The record

CVE
CVE-2026-87470
Published
Sep 9, 2026
Updated
Sep 10, 2026
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-1284, T1203
Attack vector
network
Privileges
unauthenticated

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

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=153.0.8010.36 <153.0.8010.36

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=153.0.8010.36 <153.0.8010.36

Published CVSS scores

9.6CISA ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1284Improper Validation of Specified Quantity in Input
T1203Exploitation for Client Execution

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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