Sandbox-external memory disclosure via WebView overread
Published Sep 9, 2026 · Updated Sep 10, 2026
Out-of-bounds read in Google Chrome WebView on Android before 153.0.8010.36 allows remote attackers to read memory outside the sandbox. Google identifies the WebView component and crafted HTML trigger but has not disclosed the specific code locus or incorrect bounds operation. Exploitation requires prior compromise of the renderer process, and the published impact is limited to reading out-of-sandbox memory.
Summary
What happened
Out-of-bounds read in Google Chrome WebView on Android before 153.0.8010.36 allows remote attackers to read memory outside the sandbox. Google identifies the WebView component and crafted HTML trigger but has not disclosed the specific code locus or incorrect bounds operation. Exploitation requires prior compromise of the renderer process, and the published impact is limited to reading out-of-sandbox memory.
The record
- CVE
- CVE-2026-87640
- Published
- Sep 9, 2026
- Updated
- Sep 10, 2026
- Vendor
- Google Cloud
- Product
- Google Chrome
- Classifications
- CWE-125
- Attack vector
- network
- Privileges
- Unavailable
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
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.
- 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.
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.
Weakness, pattern, technique
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
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo