Google Chrome: Use-after-free in Forms allows code execution in sandbox
Summary
Google Chrome before 156.0.8078.47 contains a use-after-free vulnerability (CWE-416) in the Forms component. A remote attacker can execute arbitrary code inside the browser sandbox by luring a user to a crafted HTML page. The attacker needs no authentication, but the victim must visit the page. Full system compromise would normally require an additional sandbox escape.
Affected
- Google Chrome prior to 156.0.8078.47
Fixed in
- Google Chrome 156.0.8078.47 or later (the latest stable build is recommended)
- Exact fixed builds per platform: Unknown. Not confirmed from the vendor advisory.
Workaround
Unknown. No vendor workaround known. Install the update and relaunch the browser.
Exploitation
- CISA SSVC assessment: exploitation none, not automatable
- No evidence of exploitation in the wild found; not listed in CISA KEV according to a third-party tracker
- No public proof of concept found
Our recommendation
- Confirm all Chrome installations run 156.0.8078.47 or later, preferably the latest stable build
- Verify that automatic updates work and fully relaunch browsers after updating
- Check other Chromium-based browsers for vendor updates
- Prioritise endpoints used for general web browsing
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 record via Vulners vulners.com
- Strix CVE record www.strix.ai
- Chrome 156 stable release overview 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, 13:08.
Original description (NVD)
Use after free in Forms 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: Medium)
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.