Origin-policy bypass via invalid StorageAccessAPI input
Published Aug 25, 2026 · Updated Aug 27, 2026
Improper input validation in Google Chrome's StorageAccessAPI before 152.0.7977.65 allows remote attackers to bypass web origin policy via crafted HTML. The public record identifies StorageAccessAPI as the locus but does not disclose which field or validation operation accepts the crafted input. Exploitation requires user interaction and prior compromise of the renderer process; the reported consequence is an origin-policy bypass, not execution outside the sandbox.
Summary
What happened
Improper input validation in Google Chrome's StorageAccessAPI before 152.0.7977.65 allows remote attackers to bypass web origin policy via crafted HTML. The public record identifies StorageAccessAPI as the locus but does not disclose which field or validation operation accepts the crafted input. Exploitation requires user interaction and prior compromise of the renderer process; the reported consequence is an origin-policy bypass, not execution outside the sandbox.
The record
- CVE
- CVE-2026-78976
- Published
- Aug 25, 2026
- Updated
- Aug 27, 2026
- Vendor
- Google Cloud
- Product
- Google Chrome
- Classifications
- CWE-20
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 25, 2026CVE publishedPublication date reported by the CVE source.
- Aug 27, 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?
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- Affected versionversion=152.0.7977.65 <152.0.7977.65
What conditions does exploitation require?
What is affected?
Published CVSS scores
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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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