Sandbox escape via WebGL use-after-free
Published May 28, 2026 · Updated May 28, 2026
Use-after-free in WebGL in Google Chrome before 148.0.7778.216 allows remote attackers to escape the browser sandbox via crafted HTML. Chrome's public advisory identifies WebGL but does not disclose the affected object, function, or lifetime error that leaves freed memory reachable. Exploitation requires user interaction and prior compromise of the renderer process, after which the attacker crosses the sandbox boundary and gains access outside the renderer's confinement.
Summary
What happened
Use-after-free in WebGL in Google Chrome before 148.0.7778.216 allows remote attackers to escape the browser sandbox via crafted HTML. Chrome's public advisory identifies WebGL but does not disclose the affected object, function, or lifetime error that leaves freed memory reachable. Exploitation requires user interaction and prior compromise of the renderer process, after which the attacker crosses the sandbox boundary and gains access outside the renderer's confinement.
The record
- CVE
- CVE-2026-9970
- Published
- May 28, 2026
- Updated
- May 28, 2026
- Vendor
- Go standard library
- Product
- Google Chrome
- Classifications
- CWE-416, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 28, 2026CVE publishedPublication date reported by the CVE source.
- May 28, 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=148.0.7778.216 <148.0.7778.216
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
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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