Google Chrome: Use-after-free in FileSystem allows code execution
Summary
A use-after-free vulnerability in the FileSystem component of Google Chrome before 156.0.8078.73 allows a remote attacker to execute arbitrary code inside the browser sandbox. The attacker only needs to lure a user to a crafted HTML page; no authentication is required, but user interaction is. Chromium rates the issue High (CVSS 8.8). The sandbox limits the impact, and full device compromise would require an additional sandbox escape, which is not described in the available sources.
Affected
- Google Chrome (desktop) prior to 156.0.8078.73
- Secondary reports list the affected Windows and macOS builds as prior to 156.0.8078.73/.74.
Fixed in
- Google Chrome 156.0.8078.73 or later (Linux)
- Google Chrome 156.0.8078.73/.74 or later (Windows and macOS, per secondary reports; confirm in the vendor advisory)
Workaround
Unknown. No interim mitigation is documented; install the update.
- Keep automatic updates enabled and restart the browser after an update.
Exploitation
- No known exploitation in the wild (per CIS advisory).
- Not listed in CISA KEV.
- CISA SSVC: exploitation none, automatable no.
- No public exploit code found in the indexes checked.
Our recommendation
- Update all Chrome installations to 156.0.8078.73 or later (use the .74 build on Windows and macOS) within days.
- Enforce automatic updates via your management tooling and verify installed versions on each device.
- Check whether other Chromium-based browsers in use (for example Edge or Brave) have shipped their own fix.
- Prioritise workstations with web browsing access.
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 entry issues.chromium.org
- CIS advisory: multiple vulnerabilities in Google Chrome www.cisecurity.org
- Malware.news: Chrome and Firefox updates fix serious security flaws malware.news
- OffSeq threat radar: CVE-2026-118347 radar.offseq.com
- Ubuntu Updates: google-chrome-stable www.ubuntuupdates.org
- CVE record mirror (vuldb) vuldb.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, 09:52.
Original description (NVD)
Use after free in FileSystem in Google Chrome prior to 156.0.8078.73 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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