Cross-origin policy bypass via released Core resource
Published Sep 29, 2026 · Updated Sep 29, 2026
Use of a released resource in Google Chrome Core before 154.0.8037.57 allows remote attackers to bypass web origin policy via crafted HTML. Core operates on a resource after its release, but Google has not disclosed the resource type, responsible function, or triggering sequence. Exploitation requires prior compromise of the renderer process; the disclosed consequence is a web-origin boundary bypass, not independent code execution or a browser sandbox escape.
Summary
What happened
Use of a released resource in Google Chrome Core before 154.0.8037.57 allows remote attackers to bypass web origin policy via crafted HTML. Core operates on a resource after its release, but Google has not disclosed the resource type, responsible function, or triggering sequence. Exploitation requires prior compromise of the renderer process; the disclosed consequence is a web-origin boundary bypass, not independent code execution or a browser sandbox escape.
The record
- CVE
- CVE-2026-95366
- Published
- Sep 29, 2026
- Updated
- Sep 29, 2026
- Vendor
- WebM Project
- Product
- Google Chrome
- Classifications
- CWE-672
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 29, 2026CVE publishedPublication date reported by the CVE source.
- Sep 29, 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=154.0.8037.57 <154.0.8037.57
What conditions does exploitation require?
What is affected?
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.
Activity data is delayed. The latest report is Sep 28, 2026.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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