Google Chrome: Improper input validation in Chromoting
Summary
Google Chrome desktop versions before 156.0.8078.47 contain an improper input validation flaw (CWE-20) in Chromoting, the component behind Chrome Remote Desktop. A remote attacker can use a crafted HTML page to potentially execute arbitrary code inside the browser sandbox. The victim must visit the malicious page, and the description does not show a sandbox escape. NVD lists a CVSS 3.1 base score of 8.8 (High), while Chromium rates the issue Low.
Affected
- Google Chrome desktop builds prior to 156.0.8078.47 (per the CVE description)
The CNA entry for the affected range is internally inconsistent and is not used here.
Fixed in
- Google Chrome 156.0.8078.47 or later (Linux)
- Google Chrome 156.0.8078.47 or later (Windows, macOS; some systems show 156.0.8078.48)
The vendor advisory text could not be retrieved; these versions come from secondary sources.
Workaround
- No workaround is available; applying the update is the fix.
- Restart the browser after updating, because an old browser process may still run.
Exploitation
- No evidence of in-the-wild exploitation was found.
- No public proof of concept was found.
- CISA SSVC: Exploitation none, Automatable no, Technical Impact total.
- Chromium security severity: Low.
- VulDB uses different third-party scores (6.3 and 7.4).
Our recommendation
- Update Google Chrome on all desktops to 156.0.8078.47 or later (or the latest 156 stable build).
- Restart Chrome after the update and verify the version under chrome://settings/help.
- Prioritise systems where Chrome Remote Desktop is installed and remove it where it is not needed.
- Enforce automatic updates through Chrome Enterprise policy.
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
- Microsoft Security Update Guide: CVE-2026-113063 msrc.microsoft.com
- Vulners CVE record vulners.com
- Ubuntu CVE tracker ubuntu.com
- VulDB entry vuldb.com
- Strix CVE summary www.strix.ai
- Cybersecurity News: Chrome 156 security update cybersecuritynews.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, 14:33.
Original description (NVD)
Improper input validation in Chromoting 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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