Google Chrome: Improper input validation in FullScreen allows sandbox code execution
Summary
Improper input validation in the FullScreen component of Google Chrome before 156.0.8078.47 could allow a remote attacker to potentially execute arbitrary code inside the browser sandbox. The attacker needs to lure a user to a crafted HTML page, so user interaction is required. Google rates the issue with Chromium security severity Low, and the CVSS base score is 8.8.
Affected
- Google Chrome desktop builds before 156.0.8078.47
- Per third-party summary of the release notice: Chrome stable builds before 156.0.8078.47 on Linux and Android; before 156.0.8078.47 or 156.0.8078.48 on Windows and macOS
- Microsoft Edge before 156.0.4314.42 (per HKCERT advisory, not verified against MSRC)
- Unknown: exact vulnerable range for other Chromium-based builds
Fixed in
- Google Chrome 156.0.8078.47 for Linux and Android
- Google Chrome 156.0.8078.47 or 156.0.8078.48 for Windows and macOS
- Debian and Ubuntu status unclear: Debian tracker may show no fix, Ubuntu lists chromium-browser as not affected because it installs the Chromium snap
Workaround
- No vendor-documented workaround known.
- Unknown.
Exploitation
- No known exploitation in the wild found.
- No CISA KEV entry or public proof of concept found.
- CISA SSVC: exploitation none, automatable no, technical impact total.
Our recommendation
- Update all Google Chrome endpoints to 156.0.8078.47 or later (156.0.8078.48 or later on Windows and macOS) and restart the browser.
- Check Microsoft Edge and other Chromium-based browsers and apply vendor updates.
- Follow your Linux distribution's Chromium updates where distribution packages are used.
- Deploy the Chrome 156 update as a whole, as it fixes 353 vulnerabilities.
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 506148052 issues.chromium.org
- Ubuntu CVE-2026-113214 ubuntu.com
- HKCERT Microsoft Edge security bulletin www.hkcert.org
- CyberSecurityNews: Chrome 156 security update fixing 353 flaws cybersecuritynews.com
- TechGeeks: Security notice Google Chrome 156 stable www.techgeeks.org
- Vulners NVD mirror CVE-2026-113214 vulners.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, 12:57.
Original description (NVD)
Improper input validation in FullScreen in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to potentially 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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