Sandbox escape via untrusted extension policy input
Published Sep 9, 2026 · Updated Sep 10, 2026
Insufficient policy enforcement in Google Chrome before 153.0.8010.36 allows remote attackers to execute code outside the sandbox. The Extensions component trusts renderer-controlled input when making a security decision, but Google has not disclosed the specific policy check or code path. Exploitation requires an already-compromised renderer, social engineering, and a crafted HTML page, so the flaw serves as a sandbox escape rather than initial renderer compromise.
Summary
What happened
Insufficient policy enforcement in Google Chrome before 153.0.8010.36 allows remote attackers to execute code outside the sandbox. The Extensions component trusts renderer-controlled input when making a security decision, but Google has not disclosed the specific policy check or code path. Exploitation requires an already-compromised renderer, social engineering, and a crafted HTML page, so the flaw serves as a sandbox escape rather than initial renderer compromise.
The record
- CVE
- CVE-2026-87479
- Published
- Sep 9, 2026
- Updated
- Sep 10, 2026
- Vendor
- Google Cloud
- Product
- Google Chrome
- Classifications
- CWE-807, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 9, 2026CVE publishedPublication date reported by the CVE source.
- Sep 10, 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.
- Affected versionversion=153.0.8010.36 <153.0.8010.36
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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