Google Chrome: Use after free in FileSystem allows code execution in sandbox
Summary
Google Chrome prior to 156.0.8078.79 contains a use-after-free vulnerability in the FileSystem component (CWE-416). A remote attacker can execute arbitrary code inside the browser sandbox by luring a user to a crafted HTML page. Exploitation requires user interaction, such as visiting the page, and the impact is limited to the sandbox unless it is chained with a sandbox escape.
Affected
- Google Chrome prior to 156.0.8078.79 (Windows, macOS, Linux)
- Android and iOS: not confirmed by the vendor advisory
Fixed in
- Google Chrome 156.0.8078.79 (Windows, Linux) and 156.0.8078.79/.80 (Windows, macOS), Stable and Extended Stable channels, released 29 October 2026
- Android: unverified, check the Play Store
Workaround
- Unknown. No vendor-recommended mitigation beyond patching.
Exploitation
- Google has not reported exploitation. The CVE is not listed in CISA KEV at the time of research.
- No public proof-of-concept found.
- EPSS: 0.2 % (percentile 10).
Our recommendation
- Check the installed Chrome version (chrome://settings/help) and confirm 156.0.8078.79 or later.
- Deploy the update via your management tooling and force a browser restart.
- Check that Chrome is not pinned to older builds by policy.
- Check Android devices and other Chromium-based browsers separately.
- Monitor CISA KEV for changes in exploitation status.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Chrome Releases: Stable Channel Update for Desktop chromereleases.googleblog.com
- Chromium issue tracker issues.chromium.org
- VulDB entry vuldb.com
- CVE record mirror cve.threatint.com
- Release summary (securityonline.info) securityonline.info
- KEV status discussion github.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 31 Oct 2026, 08:47.
Original description (NVD)
Use after free in FileSystem in Google Chrome prior to 156.0.8078.79 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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