Google Chrome: Use after free in FileSystem allows code execution in sandbox
Summary
Google Chrome before 156.0.8078.79 contains a use-after-free flaw in its FileSystem component (CWE-416). A remote attacker can execute arbitrary code inside the browser sandbox by luring a user to a crafted HTML page. The vendor rates the issue High; no user interaction beyond visiting the page is needed, and no authentication is required.
Affected
- Google Chrome versions before 156.0.8078.79
- VulDB lists the affected range up to 156.0.8078.73
- Unknown whether iOS builds are affected
Fixed in
- Google Chrome 156.0.8078.79 (Windows, Linux), 156.0.8078.79/.80 (Mac), 156.0.8078.79 (Android)
Workaround
- No vendor-published workaround. Updating and restarting Chrome is the remedy.
Exploitation
- Not known to be exploited in the wild.
- Not listed in CISA KEV according to the aggregator sources checked; cisa.gov not verified.
- No public proof-of-concept found.
- EPSS: 0.24 %.
Our recommendation
- Update Chrome to 156.0.8078.79 or later on all endpoints and restart the browser.
- For managed devices, enforce a minimum Chrome version through the update policy.
- Check the installed build on all devices, since Chrome 156 received several security updates in a short period.
- Prioritise users who browse the web or open links from email, as the attack requires a visit to a crafted page.
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 CVE-2026-76025 vuldb.com
- OffSeq threat radar radar.offseq.com
- ChromeGeek: Chrome 156 security update www.chromegeek.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, 08:52.
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.
Affected? We can help.
We check whether your systems are affected, install updates and close the gap – continuously with the System Health Checker if you wish.