Google Chrome: Use after free in Permissions allows sandbox code execution
Summary
Google Chrome versions before 156.0.8078.47 contain a use-after-free flaw (CWE-416) in the Permissions component. A remote attacker can execute arbitrary code inside the browser sandbox by luring a user to a crafted HTML page. Exploitation requires that the victim opens the page; the flaw alone does not escape the sandbox.
Affected
- Google Chrome desktop versions prior to 156.0.8078.47
- Other Chromium-based browsers that have not yet integrated the fix (versions not verified)
- Linux distributions shipping Chromium packages (status varies by distribution)
Fixed in
- Google Chrome 156.0.8078.47 or later (the Chrome Releases blog lists newer 156.x builds; use the latest 156.x build)
- Debian and Ubuntu fixed versions: unknown, check the distribution advisories
Workaround
Unknown. No workaround is known; updating Chrome is the only remediation.
Exploitation
- No evidence of exploitation in the wild found.
- Not listed in CISA KEV according to a third-party aggregator; not verified directly.
- No public proof-of-concept found.
- CISA SSVC: exploitation none, automatable no, technical impact total.
Our recommendation
- Update Google Chrome to the latest 156.x build via policy or MDM and verify the version across the managed fleet.
- Update Microsoft Edge and other Chromium-based browsers the same way.
- Apply the full Chrome 156 release, which contains many other security fixes.
- Restart the browser after the update, as the update only takes effect after a relaunch.
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
- NVD mirror on vulners.com vulners.com
- Ubuntu security tracker ubuntu.com
- Microsoft security mirror on vulners.com vulners.com
- gbhackers: Chrome 156 fixes 353 security vulnerabilities gbhackers.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, 12:33.
Original description (NVD)
Use after free in Permissions in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Low)
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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